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Alexandrite Lab Grown Gemstones

Alex.jpg (11911 bytes)

 

Alexandrites are amazing gemstones for jewelry, because faceted gems undergo a dramatic color change in different types of light. An example of this property is shown at the left. In warm indoor incandescent or candle lighting, this gem is a rich purplish red color.  In bright daylight, it is greenish blue. To see the extremes of the color change one would need to be in environments in which these light sources are pure, but nonetheless, significant color difference can easily be observed in various lighting.  Our lab grown or created man-made alexandrite, like natural alexandrite,  is a member of the chrysoberyl family which has the chemical composition beryllium aluminum oxide (BeAl2O4).   Be cautious when buying lab alexandrite, because many dealers indiscriminately use the term for imitations (such as color-change corundum).  Chrysoberyl occurs in a range of colors including green, yellow, and brown, and often exhibits a cat's eye chatoyancy.  The name alexandrite is reserved for the very rare and valuable color-change variety of chrysoberyl. The best natural chrysoberyl, including alexandrite, has been found in the Ural mountains of Russia.  In fact, the color-change variety is named after Prince Alexander of Russia because it was discovered in 1830 on the day of his coming of age.  Natural alexandrite is so rare that few people have ever seen one, and its value is on a par with emeralds, rubies, and sapphires. Our lab-grown crystals have higher perfection than is usually seen in natural stones.  We are able to offer them at a small fraction of the cost of comparable natural stones.   We categorize the degree of color change in five subjective ranges: excellent, very good, good, fair, and minimal.  The price per carat varies accordingly.  Stones with little color change tend toward a pleasant   wine-red color.  We can set these gemstones for you in silver or  gold jewelry mountings.  Ask for details.  You can click on any underlined Item # to see a photo of the gem.  Use your browser's "back" button to return to the list.  Please be aware that it is difficult to capture the true colors of alexandrite in our photographs because they depend so much on the type of lighting.

Item#

Item Description

Price

21000

Round brilliant cut Laboratory grown color change Alexandrite

21004

4 mm round The color change is excellent in these twelve ten five four  4mm round lab alexandrites faceted in a Portuguese brilliant flower cut. Perfect clarity.  Great for stud earrings.  There are 3 2 light color-tone stones,  and 7 2 medium dark. Average weight is 0.27 ct. Priced at $85/ct.  Price shown is per gem.
     

$22.95

21004o

4 mm round In the 4mm round size (on the left in the photo) we also have a new batch of 12 11 9 8 7 5 4 lab alexandrites with outstanding color change. These gems are faceted in a Portuguese brilliant flower cut and have perfect clarity. Average weight is 0.30 ct. Priced at $95/ct. Price shown is per gem. new

$28.50

21005

5 mm round These six four three 5-mm round brilliant-cut alexandrites are very nice. The average weight of these gems is 0.45 ct. They have excellent color change (see photo), and excellent clarity. Priced at $85/ct.  Price is per stone. We also have a slightly smaller gem very similar to these. Its diameter is 4.6mm, weight 0.42ct, price $35.70.    

$38.25

21005o

5 mm round We have eight seven five 5-mm round Portuguese brilliant flower cut alexandrites with outstanding color change (in the center in the photo). Their average weight is 0.57 ct. and they have excellent clarity. The hardness is 8.5 on the Mohs scale (next to Ruby at 9).  Priced at $95/ct.  Price is per stone.    new 

$54.15

21006o

6 mm round These alexandrites exhibit absolutely outstanding color change. They are 6mm round Portuguese brilliant flower cut, lab grown gems. Eye clean. There are 11 available, with an average weight of 0.88 ct. Priced at $95/ct. Price shown is per stone.  new
    
 

$83.60

21007o 7 mm round We have nine eight seven six five four of these gorgeous 7mm round lab alexandrites faceted in a Portuguese brilliant flower cut, with outstanding color change and clarity. The average weight is 1.51 ct. Priced at $95/ct., and the price is per gem.

new
 

$143.45

21008o

8 mm round There are ten nine eight seven six of these 8mm round, lab grown alexandrite Portuguese brilliant flower cut gems with outstanding color change and clarity. The average weight is 2.24 ct. Priced at $95/ct. Very nice gems, in a versatile size. The price shown is per stone. new
 

$212.80

21010 10 mm round These are very impressive gems, and two are none is available. The 10mm round size Portuguese brilliant flower cut lab-grown alexandrite would be nice as a man's or a ladies ring, or as a pendant. They have excellent color change and clarity. The average weight is 4.60 ct. Priced at $85/ct. The price shown is per gem.

sold

$391.00

21000e

10 mm round Lab grown alexandrite gems. Eye-clean. Only minimal color change, but the color is a ruby-like wine red.  The hardness of 8.5 exceeds that of most colored gemstones except ruby, sapphires and diamond.  Faceted in a 10-mm round Portuguese brilliant flower cut. The average weight is 4.46 ct. Priced at only $25/ct due to the minimal color change.  Two None available.  Price shown is per gem. sold

$111.50

21100

Oval brilliant cut Lab grown color-change Alexandrite

21164

6x4 mm oval There are is three one 6x4mm oval Portuguese brilliant flower faceted, created alexandrites available. Excellent color change and very clean. Average weight is 0.48 ct., priced at $85/ct. (Price shown at right is per gem.) The smaller size makes these affordable even with the nice color change.

 new 

$40.80

21164o

6x4 mm oval We have ten nine 6x4mm oval Portuguese brilliant flower cut, lab alexandrites available. They have outstanding color change and excellent perfection. Their average weight is 0.55 ct., priced at $95/ct. Price shown at right is per gem.

 new 

$52.25

21175

7x5 mm oval The average weight of these 7x5-mm oval synthetic alexandrites is 0.89 ct. and there are 2 0 of them available (a great pair for earrings). Faceted in a Portuguese brilliant flower cut with excellent color change and clarity. Priced at $85/ct. The price shown is per gemstone.

 new
sold

$75.65

21175g

7x5 mm oval These are similar to the gems described above, but the degree of color change is rated as "good" rather than "excellent." They are 7x5-mm oval synthetic alexandrites, average weight 0.90 ct. Four available, priced at $70/ct. The price shown is per gemstone.

 new

$63.00

21175o

7x5 mm oval With a truly outstanding degree of color change, we have these ten nine eight 7x5-mm oval lab-grown alexandrites. Faceted in a Portuguese brilliant flower cut, they have excellent clarity and an average weight of 0.90 ct. The price is $95/ct. The price shown is per gemstone.

 new

$85.50

21186 8x6 mm oval 
 
We have six five three two none 8x6mm oval lab alexandrites faceted in a Portuguese brilliant flower cut. Nice for earrings or a small ring, especially with their robust hardness of 8.5 on the Mohs scale. Excellent color change and clarity. The average weight is 1.40 ct., priced at $85/ct. The price is per gemstone.

  sold 

$119.00

21186o 8x6 mm oval 
 
Our most recent batch of lab-grown Alexandrites exhibit outstanding color change, and these ten nine eight seven  8x6mm ovals are no exception. They're faceted in a Portuguese brilliant flower cut and have excellent clarity. The average weight is 1.47 ct., priced at $95/ct. The price is per gemstone.

  new

$139.65

21197 9x7 mm oval Excellent color change in a 9x7-mm oval Portuguese brilliant flower cut synthetic alexandrite gemstone. Six Four Three Two available. Priced at $85/ct. The average weight is 2.26 ct., and the price shown is per stone.    $192.10
21108 10x8 mm oval There are 8 7 5 4 3 2 1 of these 10x8-mm oval Portuguese brilliant flower cut synthetic alexandrite gemstones available. They're priced at $85/ct.  Excellent color change as well as clarity.  The average weight is 2.92 ct.  The price shown is per stone.    $275.40
21119cl 11x9 mm oval The light color tone of these four three one 11x9-mm oval lab grown alexandrites works to good advantage for letting more light into the gemstone.  The color under incandescent light is a nice rose red, changing to a bluish green with flashes of plum under daylight.  The average weight is 4.53 ct. Priced at $85/ct.  Price shown is per gemstone.  

$385.05

21119 11x9 mm oval 11x9-mm lab alexandrites with excellent color change, faceted in an oval Portuguese brilliant flower cut.  There are three two available.  The hardness of these gems is 8.5 on the Mohs scale (only ruby, sapphire, and diamond are harder) and they hold up well to rough wear.  The average weight is 4.40 ct. Priced at $85/ct.    

$374.00

21120c 12x10 mm oval For large alexandrites, it can be advantageous to have a light color tone to show off the interior of the gemstone to better advantage and make it more lively under low-level lighting conditions.  These 3 2 1  oval 12x10-mm created alexandrite gemstones look great under all lighting conditions.  They change from a rosy red in warm lighting to a bluish green with flashes of plum in daylight.  The average weight is 5.80 ct. Priced at $85/ct.  

$493.00

21120 12x10 mm oval These six 12x10mm oval lab alexandrites have a gorgeous deep color along with excellent color change and clarity. They're faceted in a Portuguese brilliant flower cut, and on average weigh 5.56 ct. These are very nice gems! Priced at $85/ct. The price shown is per gemstone.   

$472.60

21140 14x10 mm oval The average weight of these four gorgeous lab alexandrites is 6.65 ct. They are faceted in a 14x10-mm oval Portuguese brilliant flower cut.  Excellent color change and clarity. Priced at $85/ct. The price shown at the right is per stone.   

$565.25

21300

Antique cushion cut Laboratory-grown color-change Alexandrite

21386

8x6 mm cushion This is a nice cut, a little different from the usual oval or rectangular styles. We have two one 8x6 mm cushion-cut, lab grown alexandrites, again with excellent color change and clarity (actually both are slightly larger, at 8.1x6.2mm). The triangular facets on crown and pavilion give a lot of life to these stones. The average weight is 1.85 ct., priced at $85/ct. The price shown is per gem. new

$157.25

21308 10x8 mm cushion There are 2 1 of these 10x8-mm cushion cut synthetic alexandrite gemstones available. They're priced at $85/ct.  Excellent color change as well as clarity.  The average weight is 3.56 ct.  The price shown is per stone.    $302.60

21400

Square cut Laboratory-grown color-change Alexandrite

21404

4 mm square mixed cut We have four of these small 4mm square lab alexandrites faceted in a mixed cut, with excellent color change and clarity. The average weight is 0.39 ct. Priced at $85/ct, and the price shown is per gem.

new

$33.15

21404o

4 mm cut-corner
radiant cut
These seven 4mm square lab-grown alexandrites have outstanding color change! They're faceted in a sparkling cut-corner radiant cut, and have excellent clarity. The average weight is 0.34 ct. Priced at $95/ct, and the price shown is per gem. (Far left in the photo.)

new

$32.30

21405

5 mm square cut-corner
radiant cut
In the 5mm size, we have two none lab alexandrites available in a square cut-corner radiant cut. The degree of color change and the clarity are both excellent. The average weight is 0.73 ct. Priced at $85/ct, and the price shown is per stone.

 sold
 

$62.05

21405o

5 mm square cut-corner
radiant cut
We have six four new 5mm square lab-grown alexandrites faceted in a cut-corner radiant cut. They have absolutely outstanding color change and excellent clarity. The average weight is 0.69 ct. Priced at $95/ct, and the price shown is per gemstone. (Center in photo.)

 new
 

$65.55

21406o

6 mm square cut-corner
radiant cut
There are ten lab-grown alexandrites available in the square 6mm size that have outstanding color change, as well as excellent clarity and sparkle. They are faceted in a cut-corner radiant cut, and on average weigh 1.12 ct. Priced at $95/ct., and the price shown is per stone. (Far right in photo.)

 new 

$106.40

21406p

6 mm square princess cut 
 
All four three of our 6mm square princess cut lab alexandrites are shown in the photo. Left to right, there is a matched pair, then one slightly darker than the others, then one slightly larger than the others (at 6.17mm). All have excellent color change and clarity. The average weight is 1.24ct., and they are priced at $85/ct. The price shown is per gemstone.

 new 

$105.40

21406 6 mm square cut-corner
radiant cut 
 
There are four three two of these 6mm square cut-corner radiant style synthetic alexandrites. These would be perfect for use in a variety of types of jewelry. The color change is excellent, as is the clarity. The average weight is 1.14 ct. Priced at $85/ct, and the price shown is per gem.

 
 

$96.90

21407 7 mm square cut-corner
radiant cut 
 
We have four three none lab alexandrites faceted in a 7mm square cut-corner radiant pattern. The hardness of this stone gives it durability, making it ideal for use as jewelry. The average weight at this size is 1.95 ct., and the color change and clarity are excellent. Priced at $85/ct. The price shown at the right is per stone.    sold     

$165.75

21407o 7 mm square cut-corner
radiant cut 
 
These are gorgeous gems! These five lab alexandrites exhibit an outstanding degree of color change and have excellent clarity. They are 7mm squares, faceted in the cut-corner radiant style. The average weight is 1.99 ct., priced at $95/ct. The price shown at the right is per gemstone.   new 

$189.05

21408a 8 mm square Asscher cut There are three 8mm square lab alexandrites faceted in an Asscher cut. This is like the emerald step cut except the outline is a square with octagonal corners. They exhibit an outstanding degree of color change and have excellent clarity. The average weight is 2.80 ct. Priced at $95/ct.; price shown is per gem.

new 

$266.00

21408p 8 mm square princess cut 
 
We have three two none 8mm square lab alexandrites faceted in a princess cut. Excellent color change and clarity.  Great for earrings, pendants, or rings.  The average weight is 3.06 ct. Priced at $85/ct, and the price shown is per gem.

sold  

$260.10

21408 8 mm square cut-corner
radiant cut
Also in the 8mm square size, we have 6 5 4 3 lab alexandrites faceted in a cut-corner radiant pattern. These are really nice gems! The color change is absolutely excellent, and the clarity is eye perfect. The average weight is 2.68 ct. Priced at $85/ct, and the price shown is per gem.

   

$227.80

21409

9 mm square cut-corner
radiant cut
This is a nice, versatile size for a variety of types of jewelry.  We have four three 9mm square lab grown alexandrites, again with excellent color change and clarity. They're faceted in a cut-corner radiant cut.  The triangular facets on crown and pavilion give a lot of life to these stones. The average weight is 3.82 ct., priced at $85/ct. The price shown is per gem.  

$324.70

21410p 10 mm square princess cut 
 
This is a very nice gem, and only one none is available. This 10mm square princess-cut lab-grown alexandrite would be nice as a man's or a ladies ring, or as a pendant. It has excellent color change and perfect clarity in a darker color-tone gem. The weight is 6.0 ct. Priced at $85/ct.

 sold

$510.00

21410 10 mm square cut-corner
radiant cut 
 
We have 4 3 lab grown alexandrites in the 10mm size, faceted in a square cut-corner radiant pattern. These are gorgeous gems! Their color change and clarity are rated excellent. On average they weigh 5.29ct. Priced at $85/ct. The price shown is per gem.

 

$449.65

21412 12 mm square cut-corner
radiant cut 
 
These three two large lab-grown alexandrites are very impressive! 12mm square (octagon), faceted in a cut-corner radiant pattern, with an average weight of 9.15 ct. The color change and clarity are both excellent. Priced at $85/ct. and the price shown is per gem.

 

$777.75

21500

Rectangular octagon cut Laboratory-grown color-change Alexandrite

21564c

6x4 mm rectangle We have 5 3 matched gemstones in a 6x4 mm rectangular brilliant cut size of light color-toned, lab-grown alexandrite with excellent color change. The average weight is 0.63 ct. Priced at $85/ct. The price shown at the right is per stone.

  

$53.55

21564xb

6x4 mm rectangle These two matched 6x4mm rectangular scissors cut lab alexandrites have impressive color change for small size stones. Clean under a 10x loupe, with high durability (8.5 on the Mohs hardness scale). This makes them excellent for use as jewelry. The average weight is 0.61 ct. Priced at $85/ct. The price shown is per stone.

 

$51.85

21564

6x4 mm rectangle We have four three two none more 6x4mm rectangular lab alexandrites. These are similar to 21564xb but the colors are darker and more intense. They're faceted in a cut-corner radiant pattern, and have excellent color change and clarity. The average weight is 0.66 ct. Priced at $85/ct. The price shown is per gemstone.

sold 

$56.10

21575

7x5 mm rectangle There are seven gemstones in this size of lab-grown alexandrite. The average weight is 1.09 ct. Two are cut in a 7x5mm rectangular octagon step cut, while five are faceted in a cut-corner radiant pattern. Excellent color change and clarity. Priced at $85/ct. The price shown at the right is per stone.

 

$92.65

21586

8x6 mm rectangle Faceted in an 8x6mm rectangular cut-corner radiant.  We have 6 5 4 3 in this size and style of lab-grown alexandrite. The average weight is 1.77 ct. Excellent color change.  Priced at $85/ct. The price shown at the right is per stone.    

$150.45

21597 9x7 mm rectangle Excellent color change and clarity in these 9x7-mm rectangular synthetic alexandrite gemstones.  Six  Five three two are available, faceted in a cut-corner radiant pattern.  Priced at $85/ct.  The average weight is 2.60 ct., and the price shown is per stone.  
 
$221.00
21508 10x8 mm rectangle There are seven of these beautiful lab alexandrites available in the 10x8mm size, faceted in a cut-corner radiant pattern. They exhibit excellent color change and clarity, with high durability (8.5 on the Mohs hardness scale). This makes them excellent for use as jewelry. The average weight is 3.86 ct. Priced at $85/ct. The price shown is per stone.  
 
$328.10

21519

11x9 mm rectangle We have eight 11x9mm rectangular octagon lab grown alexandrites faceted in a cut-corner radiant pattern. This size is very versatile  for any kind of jewelry, particularly pendants or rings. The hardness of alexandrites makes them durable for daily wear. The color change and clarity of these gems is excellent. The average weight is 5.14 ct. Priced at $85/ct. The price shown at right is per gemstone.  

$436.90

21520

12x10 mm rectangle These large 12x10mm synthetic alexandrites would make stunning pendants! They're faceted in the cut-corner radiant pattern. Their color change and clarity are excellent. The average weight is 6.62 ct., and three of these gems are available. Priced at $85/ct. The price shown at right is per gemstone.  

$562.70

21700

Trillion cut Laboratory-grown color-change Alexandrite

 

21706

6 mm trillion We have three two none lab-grown alexandrites in the 6mm size, faceted in a trillion Portuguese brilliant flower cut. The color change and clarity are both excellent. The average weight is 0.78 ct. The price is $85/ct., and the price shown is per gemstone. sold

$66.30

21706o

6 mm trillion These five four three one 6mm trillion lab-grown alexandrites have outstanding color change! They're well matched for use as earrings, or sold singly for other types of jewelry. Faceted in a Portuguese brilliant flower cut, with excellent clarity. The average weight is 0.78 ct. The price is $95/ct.; the price shown is per gemstone. new

$74.10

21707g

7 mm trillion There are three of these versatile 7mm lab-grown alexandrites, faceted in a trillion Portuguese brilliant flower cut. They have a nice rich color tone and great brilliance. Their color change is good. The gems are clear at 10 power magnification. The average weight is 1.33 ct. The price is $70/ct., and the price shown is per gem. new

$93.10

21708g

8 mm trillion These four 8mm lab alexandrites, faceted in a trillion Portuguese brilliant flower cut, are a nice size for either men's or ladies jewelry. Consider one for a ring or two for earrings. They have good color change and excellent clarity. The average weight is 1.96 ct., priced at $70/ct. As always, the price shown is per gem. new

$137.20

21708o

8 mm trillion We also have four three two 8mm trillion lab alexandrites with an outstanding degree of color change as well as excellent clarity, faceted in the Portuguese brilliant flower style. The average weight is 1.92 ct., priced at $95/ct. The price shown is per gemstone. new

$182.40

21709

9 mm trillion We also have two none 9mm trillion lab grown alexandrites, again with excellent color change and clarity. They're faceted in a Portuguese brilliant flower cut. This is a nice, versatile size for a variety of types of jewelry. The average weight is 2.73 ct., priced at $85/ct. The price shown is per gem.  
sold

$232.05

21710

10 mm trillion These two This 10mm trillion lab grown alexandrite, faceted in a trillion Portuguese brilliant flower cut, is a nice size for either men's or ladies jewelry. Consider one for a pendant. The clarity and color change are excellent. The average weight is 3.81 ct., priced at $85/ct. As always, the price shown is per gem.  sold

 

$323.85

21712

12 mm trillion There is just one large, 12mm trillion lab-grown alexandrite available. This gem is faceted in a Portuguese brilliant flower cut. Its degree of color change and its clarity are both excellent. The weight is 6.31 ct., priced at $85/ct.  sold

$536.35

21800

Heart-shape cut Laboratory-grown color-change Alexandrite

21807

7 mm heart These two 7mm heart shaped lab alexandrites are very sweet looking. They're faceted in a Portuguese brilliant flower cut, and their clarity and color change are excellent. The average weight is 1.45 ct. Priced at $85/ct.  

$123.25

21808

8 mm heart We have two very nice 8mm heart shaped lab-created alexandrites, faceted in the Portuguese brilliant flower style. Clarity and color change are both excellent. The gems weigh 2.06 ct. on average, and are priced at $85/ct. The price shown is per gem.  

$175.10

21809m

9 mm heart These three 9mm hearts have rich color and excellent clarity, and exhibit a moderate degree of color change. The heart shape is faceted in a Portuguese brilliant flower cut. Priced at $55/ct. The average weight of these lab grown alexandrites is 2.78 ct. The price shown is per stone. new

$152.90

21810

10 mm heart These two large heart shaped 10mm lab alexandrites are really lovely.  They're faceted in a Portuguese brilliant flower heart-shape cut, and have excellent color change and clarity. The average weight is 4.23 ct. and the price is $85/ct, priced per stone.  

$359.55

21812

12 mm heart We have one 12mm heart shaped lab-created alexandrite, faceted in the Portuguese brilliant flower style. Clarity and color change are both excellent. The gem weighs 7.07 ct. and is priced at $85/ct. sold 

$600.95

21900

Pear-shape cut Laboratory-grown color-change Alexandrite

21996

9x6 mm pear Four Two of these 9x6 mm pear shaped lab grown alexandrite available. They are faceted in the Portuguese brilliant flower style, and the color change and clarity are excellent. The typical weight is 1.52 ct. The price is $85/ct, priced per gem.  

$129.20

21907

10x7 mm pear There are 5 4 3 of these nicely-sized, matched, 10x7mm lab grown pear alexandrites available. They're faceted in the Portuguese brilliant flower style, and their color change and clarity are excellent. The average weight is 2.24 ct. The price is $85/ct, priced per gem.  Great for a lady's ring or pendant.  

$190.40

21939

13x9 mm pear We have 2 of these 13x9mm pear shaped, deep-color-toned lab-grown alexandrites available. They are faceted in a Portuguese brilliant flower cut, with excellent color change and clarity. One of these would make a gorgeous pendant. The average weight is 4.63 ct. The price is $85/ct, priced per gem.  

$393.55

21950

15x10 mm pear These two large pear shaped 15x10mm lab alexandrites are really lovely. Two are available. They're faceted in a Portuguese brilliant flower cut, and have excellent color change and clarity. The average weight is 6.62 ct. and the price is $85/ct, priced per stone.  

$562.70

Remember, we can set these gemstones in a variety of jewelry mountings.  Ask for details.

 
 
See www.siliconsultant.com 
for consulting services in silicon crystal growth.
Last modified:  June 19, 2016

 

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