Alexandrite (21.40 Carat )
20.01 x 20.01 mm
Stone Type : | Alexandrite |
Stone Shape : | Trillion |
Stone Weight : | 21.40 carat |
Length X Width : | 20.01 x 20.01 mm |
Length / Width Ratio : | 1.00 |
Approx Face-up Area : | 248.24 mm² |
Approx Volume : | 1,156.63 mm³ |
How many Colors Available for Alexandrite ?
Red , Dark Red , Light Brown , Brown , Dark Brown , Light Yellowish Green , Yellowish Green , Dark Yellowish Green , Light Green , Green , Dark Green , Light Bluish Green , Bluish Green , Dark Bluish Green , Light Violet , Violet , Dark Violet , Light Purple , Purple , Dark Purple ,
Named after Czar Alexander II (1818–1881) Alexandrite is a rare and valuable color-change variety of chrysoberyl. Alexandrite possesses a surprising ability to change color - from green or bluish-green in daylight, it transforms to purplish or raspberry red in incandescent light.
Name of Stone : | Alexandrite |
Mineral : | Chrysoberyl |
Shape : | Trillion |
Chemical Formula : | BeAl2O4 |
Crystal Structure : | Orthorhombic |
Hardness : | 8.5 |
Specific Gravity : | 3.7 |
Carat weight : | 21.40 carat |
Gram weight : | 4.280 gm |
Ounces weight : | 0.1510 ounces |
Length : | 20.01 mm |
Width : | 20.01 mm |
Length / Width Ratio : | 1.00 |
Average diameter : | 20.01 mm |
Approx Face-up Area : | 248.24 mm² |
Approx Volume : | 1,156.63 mm³ |
Refractive Index : | 1.744 - 1.755 |
Cleavage : | 1,1 ; 3,2 |
Luster : | Vitreous |
Birefringence : | 0.009 |
Wearability : | Durable gem for daily wear |
Birthstone : | Alexandrite is a birthstone for the month of June |
Before purchasing a diamond, one should make sure it looks its weight. It's important to understand that carat weight does not equal face-up size.
Two diamonds of exactly the same weight (and shape) can vary quite considerably in face-up size. This depends on the proportions of the cut (e.g., deep cuts will face up smaller)..
Face-up area is a measure of the size of the diamond when viewed from the top view.
It tells you how big the diamond is at the girdle plane. It's important for a diamond to have sufficient face-up size for its carat weight
Diamond prices vary greatly as they depend on the combination of unique characteristics (4Cs - Cut, Color, Clarity, and Carat). For best value, it's important to choose the combination that will reduce the price without having a negative impact on appearance.
You also need to consider some of the following points as well
- Strong blue fluorescence.
- Fair or Poor symmetry.
- Extremely thin or extremely thick girdle.
- Inclusions visible to the naked eye.
- Diamond Certification.
Blue fluorescence can have a positive, negative, or zero effect on a diamond. Diamonds in the lower color range (H or lower) can benefit from it, as it can make them look whiter, more colorless. On the other hand, strong fluorescence can cause a stone (especially in the higher color range D-G) to appear hazy or milky under certain light conditions. One of the biggest benefits of fluorescent diamonds is that they generally cost less.
Blue fluorescence can be found in 35% of naturally mined diamonds and it makes the stone glow under UV light. Outside of UV lighting environments, there are no visual differences between fluorescent and non-fluorescent diamonds.
However, there exists a big difference in pricing between these diamonds. In the industry, diamonds with fluorescence are usually traded at a 10-15% discount and can go as high as 25% for higher colored diamonds.
GIA grades fluorescence as None, Faint, Medium, Strong, and Very Strong.
There are Many Laboratory Available which provides certification for Gemstones.
- GIA - Gemological Institute of America
- AGS - American Gemological Society
- HRD - The Hoge Raad voor Diamant
- IGI - International Gemological Institute
- EGL - European Gemological Laboratories
- GSI - Gemological Science International
*Different certification labs give different results
Piecut Diamonds are set of small Diamonds, which are cut & polished with Precised Measurements to look like a Single Solitaire diamond which can save 80% to 85% from Solitaire Single Piece Price.
Shapes of Pie Cut Diamonds.
- 9 Pcs Emerald
- 9 Pcs Round
- 4 Pcs Round
- 3 Pcs Heart
- 4 Pcs Oval
- 4 Pcs Pear
- 4 Pcs Marquise
- 5 Pcs Star
Click here for More Information
9.50 ct - Trillion - Alexandrite
8.80 ct - Trillion - Alexandrite
0.80 ct - Trillion - Alexandrite
19.10 ct - Trillion - Alexandrite
17.30 ct - Trillion - Alexandrite
12.40 ct - Trillion - Alexandrite
26.60 ct - Trillion - Alexandrite
23.90 ct - Trillion - Alexandrite
27.20 ct - Trillion - Alexandrite
37.00 ct - Trillion - Alexandrite
33.90 ct - Trillion - Alexandrite
39.10 ct - Trillion - Alexandrite
8.80 ct - Trillion - Alexandrite
0.80 ct - Trillion - Alexandrite
19.10 ct - Trillion - Alexandrite
17.30 ct - Trillion - Alexandrite
12.40 ct - Trillion - Alexandrite
26.60 ct - Trillion - Alexandrite
23.90 ct - Trillion - Alexandrite
27.20 ct - Trillion - Alexandrite
37.00 ct - Trillion - Alexandrite
33.90 ct - Trillion - Alexandrite
39.10 ct - Trillion - Alexandrite
1.40 ct - Emerald - Oval
4.50 ct - Citrine - Emerald
5.80 ct - Diamond - Round
0.90 ct - Apatite - Round
6.80 ct - Quartz - Pear
3.10 ct - Citrine - Oval
19.70 ct - Emerald - Oval
12.70 ct - Sinhalite - Emerald
14.30 ct - Chrysoberyl - Princess
19.20 ct - Peridot - Baguette
12.30 ct - Alexandrite - Princess
19.30 ct - Hiddenite - Cushion
29.20 ct - Amethyst - Emerald
28.00 ct - Spinel - Oval
25.90 ct - Tanzanite - Baguette
25.80 ct - Alexandrite - Trillion
28.00 ct - Benitoite - Oval
23.70 ct - Tanzanite - Cushion
35.50 ct - Alexandrite - Pear
40.00 ct - Citrine - Cushion
34.10 ct - Quartz - Baguette
35.40 ct - Ruby - Princess
35.30 ct - Sapphire - Trillion
30.30 ct - Benitoite - Marquise
V S
4.50 ct - Citrine - Emerald
5.80 ct - Diamond - Round
V S
0.90 ct - Apatite - Round
6.80 ct - Quartz - Pear
V S
3.10 ct - Citrine - Oval
19.70 ct - Emerald - Oval
V S
12.70 ct - Sinhalite - Emerald
14.30 ct - Chrysoberyl - Princess
V S
19.20 ct - Peridot - Baguette
12.30 ct - Alexandrite - Princess
V S
19.30 ct - Hiddenite - Cushion
29.20 ct - Amethyst - Emerald
V S
28.00 ct - Spinel - Oval
25.90 ct - Tanzanite - Baguette
V S
25.80 ct - Alexandrite - Trillion
28.00 ct - Benitoite - Oval
V S
23.70 ct - Tanzanite - Cushion
35.50 ct - Alexandrite - Pear
V S
40.00 ct - Citrine - Cushion
34.10 ct - Quartz - Baguette
V S
35.40 ct - Ruby - Princess
35.30 ct - Sapphire - Trillion
V S
30.30 ct - Benitoite - Marquise
8.30 ct - Princess- Diamond
9.00 ct - Cushion- Diamond
7.00 ct - Princess- Diamond
4.20 ct - Trillion- Diamond
1.10 ct - Baguette- Diamond
8.20 ct - Trillion- Diamond
18.00 ct - Oval- Diamond
19.60 ct - Pear- Diamond
18.60 ct - Princess- Diamond
15.70 ct - Pear- Diamond
11.70 ct - Pear- Diamond
13.00 ct - Cushion- Diamond
20.10 ct - Pear- Diamond
25.40 ct - Cushion- Diamond
21.30 ct - Marquise- Diamond
21.40 ct - Oval- Diamond
29.00 ct - Trillion- Diamond
28.40 ct - Cushion- Diamond
36.70 ct - Oval- Diamond
37.80 ct - Baguette- Diamond
38.70 ct - Marquise- Diamond
34.80 ct - Pear- Diamond
30.20 ct - Marquise- Diamond
35.40 ct - Emerald- Diamond
V S
9.00 ct - Cushion- Diamond
7.00 ct - Princess- Diamond
V S
4.20 ct - Trillion- Diamond
1.10 ct - Baguette- Diamond
V S
8.20 ct - Trillion- Diamond
18.00 ct - Oval- Diamond
V S
19.60 ct - Pear- Diamond
18.60 ct - Princess- Diamond
V S
15.70 ct - Pear- Diamond
11.70 ct - Pear- Diamond
V S
13.00 ct - Cushion- Diamond
20.10 ct - Pear- Diamond
V S
25.40 ct - Cushion- Diamond
21.30 ct - Marquise- Diamond
V S
21.40 ct - Oval- Diamond
29.00 ct - Trillion- Diamond
V S
28.40 ct - Cushion- Diamond
36.70 ct - Oval- Diamond
V S
37.80 ct - Baguette- Diamond
38.70 ct - Marquise- Diamond
V S
34.80 ct - Pear- Diamond
30.20 ct - Marquise- Diamond
V S
35.40 ct - Emerald- Diamond