Topaz (15.00 Carat )
19.44 x 12.97 mm
Stone Type : | Topaz |
Stone Shape : | Oval |
Stone Weight : | 15.00 carat |
Length X Width : | 19.44 x 12.97 mm |
Length / Width Ratio : | 1.50 |
Approx Face-up Area : | 206.80 mm² |
Approx Volume : | 849.87 mm³ |
How many Colors Available for Topaz ?
White , Light Red , Red , Dark Red , Orangey Red , Light Orange , Orange , Light Brown , Brown , Dark Brown , Light Yellow , Yellow , Light Yellowish Green , Yellowish Green , Dark Yellowish Green , Light Green , Green , Dark Green , Light Bluish Green , Bluish Green , Dark Bluish Green , Light Blue , Blue , Dark Blue , Light Violet , Violet , Dark Violet , Light Purple , Purple , Dark Purple , Light Grey , Grey ,
Topaz is a gemstone of many colors. It’s commonly found colorless (white) and then treated to achieve desired colors. Blue Topaz is the most common and popular color variety.
Name of Stone : | Topaz |
Mineral : | Topaz |
Shape : | Oval |
Chemical Formula : | Al2SiO4(F,OH)2 |
Crystal Structure : | Orthorhombic |
Hardness : | 8 |
Specific Gravity : | 3.53 |
Carat weight : | 15.00 carat |
Gram weight : | 3.000 gm |
Ounces weight : | 0.1058 ounces |
Length : | 19.44 mm |
Width : | 12.97 mm |
Length / Width Ratio : | 1.50 |
Average diameter : | 16.21 mm |
Approx Face-up Area : | 206.80 mm² |
Approx Volume : | 849.87 mm³ |
Refractive Index : | 1.610 - 1.638 |
Cleavage : | 1,3 - basal |
Luster : | Vitreous |
Birefringence : | 0.014 |
Wearability : | Very good |
Birthstone : | Topaz is a birthstone for the month of December |
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
8.30 ct - Sinhalite - Oval
3.40 ct - Tanzanite - Baguette
9.70 ct - Kunzite - Baguette
1.40 ct - Peridot - Round
0.60 ct - Kyanite - Trillion
4.70 ct - Amethyst - Oval
11.10 ct - Hiddenite - Oval
16.30 ct - Diamond - Princess
11.60 ct - Ruby - Trillion
19.70 ct - Sapphire - Trillion
12.90 ct - Sinhalite - Baguette
17.40 ct - Citrine - Round
21.20 ct - Peridot - Princess
21.90 ct - Diamond - Baguette
20.50 ct - Peridot - Round
25.00 ct - Spinel - Cushion
20.00 ct - Morganite - Round
30.00 ct - Amethyst - Cushion
36.60 ct - Sapphire - Baguette
32.50 ct - Citrine - Marquise
32.70 ct - Sapphire - Baguette
31.00 ct - Tanzanite - Cushion
30.60 ct - Beryl - Cushion
31.40 ct - Quartz - Oval
V S
3.40 ct - Tanzanite - Baguette
9.70 ct - Kunzite - Baguette
V S
1.40 ct - Peridot - Round
0.60 ct - Kyanite - Trillion
V S
4.70 ct - Amethyst - Oval
11.10 ct - Hiddenite - Oval
V S
16.30 ct - Diamond - Princess
11.60 ct - Ruby - Trillion
V S
19.70 ct - Sapphire - Trillion
12.90 ct - Sinhalite - Baguette
V S
17.40 ct - Citrine - Round
21.20 ct - Peridot - Princess
V S
21.90 ct - Diamond - Baguette
20.50 ct - Peridot - Round
V S
25.00 ct - Spinel - Cushion
20.00 ct - Morganite - Round
V S
30.00 ct - Amethyst - Cushion
36.60 ct - Sapphire - Baguette
V S
32.50 ct - Citrine - Marquise
32.70 ct - Sapphire - Baguette
V S
31.00 ct - Tanzanite - Cushion
30.60 ct - Beryl - Cushion
V S
31.40 ct - Quartz - Oval
4.00 ct - Baguette- Diamond
5.70 ct - Oval- Diamond
3.60 ct - Oval- Diamond
8.80 ct - Oval- Diamond
7.50 ct - Emerald- Diamond
7.50 ct - Cushion- Diamond
12.60 ct - Baguette- Diamond
12.20 ct - Marquise- Diamond
18.50 ct - Princess- Diamond
10.10 ct - Pear- Diamond
13.50 ct - Marquise- Diamond
16.60 ct - Baguette- Diamond
26.60 ct - Emerald- Diamond
28.30 ct - Cushion- Diamond
22.10 ct - Round- Diamond
24.50 ct - Cushion- Diamond
21.20 ct - Cushion- Diamond
24.40 ct - Cushion- Diamond
31.70 ct - Princess- Diamond
30.00 ct - Oval- Diamond
31.70 ct - Round- Diamond
32.70 ct - Baguette- Diamond
32.60 ct - Cushion- Diamond
31.90 ct - Oval- Diamond
V S
5.70 ct - Oval- Diamond
3.60 ct - Oval- Diamond
V S
8.80 ct - Oval- Diamond
7.50 ct - Emerald- Diamond
V S
7.50 ct - Cushion- Diamond
12.60 ct - Baguette- Diamond
V S
12.20 ct - Marquise- Diamond
18.50 ct - Princess- Diamond
V S
10.10 ct - Pear- Diamond
13.50 ct - Marquise- Diamond
V S
16.60 ct - Baguette- Diamond
26.60 ct - Emerald- Diamond
V S
28.30 ct - Cushion- Diamond
22.10 ct - Round- Diamond
V S
24.50 ct - Cushion- Diamond
21.20 ct - Cushion- Diamond
V S
24.40 ct - Cushion- Diamond
31.70 ct - Princess- Diamond
V S
30.00 ct - Oval- Diamond
31.70 ct - Round- Diamond
V S
32.70 ct - Baguette- Diamond
32.60 ct - Cushion- Diamond
V S
31.90 ct - Oval- Diamond