Alexandrite (28.70 Carat )
20.05 x 14.84 mm
Stone Type : | Alexandrite |
Stone Shape : | Emerald |
Stone Weight : | 28.70 carat |
Length X Width : | 20.05 x 14.84 mm |
Length / Width Ratio : | 1.35 |
Approx Face-up Area : | 276.79 mm² |
Approx Volume : | 1,551.18 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 : | Emerald |
Chemical Formula : | BeAl2O4 |
Crystal Structure : | Orthorhombic |
Hardness : | 8.5 |
Specific Gravity : | 3.7 |
Carat weight : | 28.70 carat |
Gram weight : | 5.740 gm |
Ounces weight : | 0.2025 ounces |
Length : | 20.05 mm |
Width : | 14.84 mm |
Length / Width Ratio : | 1.35 |
Average diameter : | 17.45 mm |
Approx Face-up Area : | 276.79 mm² |
Approx Volume : | 1,551.18 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
9.00 ct - Emerald - Alexandrite
5.10 ct - Emerald - Alexandrite
7.80 ct - Emerald - Alexandrite
14.60 ct - Emerald - Alexandrite
10.30 ct - Emerald - Alexandrite
17.70 ct - Emerald - Alexandrite
24.90 ct - Emerald - Alexandrite
23.80 ct - Emerald - Alexandrite
20.80 ct - Emerald - Alexandrite
34.40 ct - Emerald - Alexandrite
39.10 ct - Emerald - Alexandrite
35.50 ct - Emerald - Alexandrite
5.10 ct - Emerald - Alexandrite
7.80 ct - Emerald - Alexandrite
14.60 ct - Emerald - Alexandrite
10.30 ct - Emerald - Alexandrite
17.70 ct - Emerald - Alexandrite
24.90 ct - Emerald - Alexandrite
23.80 ct - Emerald - Alexandrite
20.80 ct - Emerald - Alexandrite
34.40 ct - Emerald - Alexandrite
39.10 ct - Emerald - Alexandrite
35.50 ct - Emerald - Alexandrite
3.20 ct - Andesine - Emerald
1.80 ct - Andesine - Trillion
2.00 ct - Benitoite - Round
10.00 ct - Sapphire - Princess
7.20 ct - Andesine - Baguette
5.00 ct - Alexandrite - Round
17.50 ct - Peridot - Baguette
19.70 ct - Emerald - Cushion
16.60 ct - Citrine - Emerald
14.50 ct - Aquamarine - Trillion
12.40 ct - Chrysoberyl - Trillion
13.70 ct - Beryl - Round
24.90 ct - Diopside - Princess
28.70 ct - Tanzanite - Round
20.90 ct - Peridot - Baguette
21.80 ct - Morganite - Princess
20.30 ct - Peridot - Emerald
27.10 ct - Benitoite - Baguette
31.60 ct - Citrine - Baguette
37.60 ct - Aquamarine - Marquise
37.70 ct - Andesine - Pear
30.50 ct - Amethyst - Trillion
37.20 ct - Alexandrite - Round
36.70 ct - Peridot - Pear
V S
1.80 ct - Andesine - Trillion
2.00 ct - Benitoite - Round
V S
10.00 ct - Sapphire - Princess
7.20 ct - Andesine - Baguette
V S
5.00 ct - Alexandrite - Round
17.50 ct - Peridot - Baguette
V S
19.70 ct - Emerald - Cushion
16.60 ct - Citrine - Emerald
V S
14.50 ct - Aquamarine - Trillion
12.40 ct - Chrysoberyl - Trillion
V S
13.70 ct - Beryl - Round
24.90 ct - Diopside - Princess
V S
28.70 ct - Tanzanite - Round
20.90 ct - Peridot - Baguette
V S
21.80 ct - Morganite - Princess
20.30 ct - Peridot - Emerald
V S
27.10 ct - Benitoite - Baguette
31.60 ct - Citrine - Baguette
V S
37.60 ct - Aquamarine - Marquise
37.70 ct - Andesine - Pear
V S
30.50 ct - Amethyst - Trillion
37.20 ct - Alexandrite - Round
V S
36.70 ct - Peridot - Pear
1.00 ct - Oval- Diamond
7.20 ct - Round- Diamond
3.30 ct - Marquise- Diamond
3.60 ct - Princess- Diamond
3.70 ct - Baguette- Diamond
4.80 ct - Trillion- Diamond
14.10 ct - Princess- Diamond
15.20 ct - Pear- Diamond
12.40 ct - Baguette- Diamond
19.50 ct - Cushion- Diamond
13.20 ct - Trillion- Diamond
11.90 ct - Round- Diamond
20.80 ct - Pear- Diamond
29.70 ct - Cushion- Diamond
28.90 ct - Oval- Diamond
29.10 ct - Pear- Diamond
27.70 ct - Oval- Diamond
25.20 ct - Emerald- Diamond
30.70 ct - Emerald- Diamond
30.90 ct - Cushion- Diamond
37.70 ct - Baguette- Diamond
35.80 ct - Princess- Diamond
31.00 ct - Marquise- Diamond
37.40 ct - Cushion- Diamond
V S
7.20 ct - Round- Diamond
3.30 ct - Marquise- Diamond
V S
3.60 ct - Princess- Diamond
3.70 ct - Baguette- Diamond
V S
4.80 ct - Trillion- Diamond
14.10 ct - Princess- Diamond
V S
15.20 ct - Pear- Diamond
12.40 ct - Baguette- Diamond
V S
19.50 ct - Cushion- Diamond
13.20 ct - Trillion- Diamond
V S
11.90 ct - Round- Diamond
20.80 ct - Pear- Diamond
V S
29.70 ct - Cushion- Diamond
28.90 ct - Oval- Diamond
V S
29.10 ct - Pear- Diamond
27.70 ct - Oval- Diamond
V S
25.20 ct - Emerald- Diamond
30.70 ct - Emerald- Diamond
V S
30.90 ct - Cushion- Diamond
37.70 ct - Baguette- Diamond
V S
35.80 ct - Princess- Diamond
31.00 ct - Marquise- Diamond
V S
37.40 ct - Cushion- Diamond