2.5 Carat Amethyst Round (9.31×9.31mm, Violet)
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
Amethyst is a purple variety of quartz and a very popular and affordable gem. Its name originates from the Greek word amethystos which means "not drunken". Ancient Greeks believed it could prevent intoxication. Amethyst is considered the most valuable of quartz gemstones.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
|
Name:
|
Amethyst |
|
Mineral Class:
|
Quartz |
|
Shape:
|
Round |
|
Chemical Formula:
|
SiO2 |
|
Crystal Structure:
|
Hexagonal |
|
Hardness:
|
7 |
|
Specific Gravity
|
2.65 |
|
Carat weight:
|
2.5 ct |
|
Gram weight:
|
0.5 g (0.0176 ounces) |
|
Points:
|
250 pts |
|
Length:
|
9.31 mm |
|
Width:
|
9.31 mm |
|
Average diameter:
|
9.31 mm |
|
Est. face-up size:
|
68.08 mm² |
|
Volume:
|
188.68 mm³ |
|
Length-to-width ratio:
|
1 |
|
Refractive Index:
|
1.54 - 1.55 |
|
Cleavage:
|
Indiscernible |
|
Luster:
|
Vitreous |
|
Birefringence:
|
0.009 |
|
Wearability:
|
Very good |
|
Care Instructions:
|
No special or unusual care |
|
Color:
|
    
|
|
Birthstone:
|
Amethyst is a birthstone for the month of February |
Popular comparisons:
- 2.5ct Amethyst (Round, Violet, 9.31 x 9.31) vs. 2.5ct Diamond (Round, White, 8.82 x 8.82)
- 2.5ct Amethyst (Round, Violet, 9.31 x 9.31) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.5ct Amethyst (Round, Violet, 9.31 x 9.31) vs. 1.65ct Sapphire (Emerald, Blue, 7.8 x 5.8)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04)
- 2ct Amethyst (Round, Violet, 8.64 x 8.64) vs. 2ct Amethyst (Oval, Violet, 10.94 x 7.29)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)
- 8ct Amethyst (Round, Violet, 13.72 x 13.72) vs. 8ct Emerald (Emerald, Green, 14.55 x 10.78)
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.