12.5 Carat Tanzanite Emerald (15.8×11.7mm, Blue)
Actual size is set for screen
Change
Settings »
Ring:
Skin tone:
|
Ring width:
3.0 mm
|
Saved...
64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
|
Saved...
|
|
|
Ring diameter:
16.9 mm
|
Additional Info
Tanzanite is a blue variety of the mineral Zoisite. It got its name after the East African country of Tanzania, were it was discovered in 1967. Most of Tanzanite on the market today is heat treated.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
|
Name:
|
Tanzanite |
|
Mineral Class:
|
Zoisite |
|
Shape:
|
Emerald |
|
Chemical Formula:
|
Ca2Al3(SiO4)3(OH) |
|
Crystal Structure:
|
Orthorhombic |
|
Hardness:
|
6-6.5 |
|
Specific Gravity
|
3.3 |
|
Carat weight:
|
12.5 ct |
|
Gram weight:
|
2.5 g (0.0882 ounces) |
|
Points:
|
1250 pts |
|
Length:
|
15.8 mm |
|
Width:
|
11.7 mm |
|
Est. face-up size:
|
171.92 mm² |
|
Volume:
|
757.58 mm³ |
|
Length-to-width ratio:
|
1.35 |
|
Refractive Index:
|
1.69 - 1.70 |
|
Cleavage:
|
1,1 |
|
Luster:
|
Vitreous |
|
Birefringence:
|
0.009 |
|
Wearability:
|
Very good |
|
Care Instructions:
|
gentle wear recommended |
|
Color:
|
 
|
|
Birthstone:
|
Tanzanite is a birthstone for the month of December |
Popular comparisons:
- 12.5ct Tanzanite (Emerald, Blue, 15.8 x 11.7) vs. 12.5ct Diamond (Emerald, White, 15.51 x 11.49)
- 12.5ct Tanzanite (Emerald, Blue, 15.8 x 11.7) vs. 12.5ct Citrine (Emerald, Light Orange, 17 x 12.59)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 3ct Tanzanite (Emerald, Blue, 9.81 x 7.27)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 4ct Tanzanite (Emerald, Blue, 10.81 x 8.01)
- 0.49ct Tanzanite (Emerald, Blue, 5.37 x 3.98) vs. 0.5ct Emerald (Emerald, Green, 5.78 x 4.28)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 5ct Tanzanite (Emerald, Blue, 11.64 x 8.62) vs. 2ct Diamond (Marquise, White, 13.08 x 6.54)
Enter your screen size (diagonal)
My screen size is
inches
Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.