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Rare Demantoid Garnet 4.00 ct Untreated Baluchistan Mine SKU 7
- 存貨單位
- 尺寸（毫米）
- 10.150 x 6.950 x 6.130mm
- 重量 (cts)
- 4.000
- Treatment
- No Treatment
- Shape
- Cushion
- 類型
- Faceted
- 顏色
-
Demantoid is a garnet gemstone variety with an emerald-green color and mesmerizing, diamond-like sparkle. This type of garnet originates from Russia, sometimes dubbed the “Czar of garnets.” It’s known for being the most brilliant and currently most valuable garnet variety.
Are demantoids rare? Very rare — one of the rarest varieties of garnet, in fact! You probably know red garnets the best, as green is one of the rarest but also very desirable garnet colors. Even further, demantoid is one of the rarest colored gemstones, too!
Demantoid is a brilliant green semi-precious gemstone in the andradite garnet species. The only other green garnets are uvarovite, tsavorite, sometimes Mali garnet, and of course, demantoid.
Because it resembles peridot, other names used for demantoid include olivine, Uralian emerald, Ural chrysolite, Siberian chrysolite, and Bobrovsk emerald. However, these are all incorrect and against regulations set by the Federal Trade Commission (FTC).
As a garnet, demantoid serves as a birthstone for January, as well as a Capricorn or Aquarius zodiac stone. Additionally, green garnets traditionally commemorate the 25th wedding anniversary!
Demantoid Specifications & Characteristics
Demantoid is an andradite, the iron- and calcium-rich garnet species — formula Ca3Fe2(SiO4)3 — in the larger ugrandite garnet group. Other andradite garnets are topazolite, melanite, and rainbow andradite, but demantoid is the most valuable and widely known andradite variety.
The easiest way to identify demantoids is by the presence of horsetail inclusions (discussed more in-depth in the Clarity section). Not every demantoid has these inclusions, but demantoid is the only green gemstone that has them. Outside of demantoid, they’ve only been found in brown andradite as of 2018.
With a Mohs scale ranking of 6.5 to 7, demantoid’s hardness is the only trait that puts it slightly below other garnets.
On the other hand, demantoid beats other garnets with its diamond-like luster and high dispersion (a.k.a. “fire” or colorful sparkle). The dispersion (0.057) is even higher than that of diamond at 0.044!
Here are all of the demantoid garnet properties:
Mineral family: Andradite Garnet
Mohs hardness: 6.5-7
Color: Yellow-green, emerald-green, or deep green, sometimes brownish tint
Crystal structure: Isometric/Cubic
Luster: Adamantine
Transparency: Transparent
Refractive index: 1.880-1.888
Density: 3.81-3.89
Cleavage: None
Fracture: Conchoidal
Streak: White
Luminescence: None
Optical effects: Rarely chatoyancy
TREATMENT NONE
COLOR GREEN
Feel free to to “make an offer” on our other items :)
We Accept Payments through
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Direct Deposit
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- 存貨單位
- 尺寸（毫米）
- 10.150 x 6.950 x 6.130 mm
- 重量 (cts)
- 4.000
- Treatment
- No Treatment
- Shape
- Cushion
- 類型
- Faceted
- 顏色
-
Demantoid is a garnet gemstone variety with an emerald-green color and mesmerizing, diamond-like sparkle. This type of garnet originates from Russia, sometimes dubbed the “Czar of garnets.” It’s known for being the most brilliant and currently most valuable garnet variety.
Are demantoids rare? Very rare — one of the rarest varieties of garnet, in fact! You probably know red garnets the best, as green is one of the rarest but also very desirable garnet colors. Even further, demantoid is one of the rarest colored gemstones, too!
Demantoid is a brilliant green semi-precious gemstone in the andradite garnet species. The only other green garnets are uvarovite, tsavorite, sometimes Mali garnet, and of course, demantoid.
Because it resembles peridot, other names used for demantoid include olivine, Uralian emerald, Ural chrysolite, Siberian chrysolite, and Bobrovsk emerald. However, these are all incorrect and against regulations set by the Federal Trade Commission (FTC).
As a garnet, demantoid serves as a birthstone for January, as well as a Capricorn or Aquarius zodiac stone. Additionally, green garnets traditionally commemorate the 25th wedding anniversary!
Demantoid Specifications & Characteristics
Demantoid is an andradite, the iron- and calcium-rich garnet species — formula Ca3Fe2(SiO4)3 — in the larger ugrandite garnet group. Other andradite garnets are topazolite, melanite, and rainbow andradite, but demantoid is the most valuable and widely known andradite variety.
The easiest way to identify demantoids is by the presence of horsetail inclusions (discussed more in-depth in the Clarity section). Not every demantoid has these inclusions, but demantoid is the only green gemstone that has them. Outside of demantoid, they’ve only been found in brown andradite as of 2018.
With a Mohs scale ranking of 6.5 to 7, demantoid’s hardness is the only trait that puts it slightly below other garnets.
On the other hand, demantoid beats other garnets with its diamond-like luster and high dispersion (a.k.a. “fire” or colorful sparkle). The dispersion (0.057) is even higher than that of diamond at 0.044!
Here are all of the demantoid garnet properties:
Mineral family: Andradite Garnet
Mohs hardness: 6.5-7
Color: Yellow-green, emerald-green, or deep green, sometimes brownish tint
Crystal structure: Isometric/Cubic
Luster: Adamantine
Transparency: Transparent
Refractive index: 1.880-1.888
Density: 3.81-3.89
Cleavage: None
Fracture: Conchoidal
Streak: White
Luminescence: None
Optical effects: Rarely chatoyancy
TREATMENT NONE
COLOR GREEN
Feel free to to “make an offer” on our other items :)
We Accept Payments through
Paypal
Direct Deposit
Credit Cards
| 運輸商 | 運送至：國家 | 運送到世界其他地區 |
|---|---|---|
| FedEx | $35.00 / ：幾天天 | $35.00 / ：幾天天 |
|
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FedEx 對包含 2 或更多商品的訂單折扣為 $35.00
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $35.00
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| Express Shipping | $55.00 / ：幾天天 | $55.00 / ：幾天天 |
|
：國家
Express Shipping 對包含 2 或更多商品的訂單折扣為 $55.00
世界其他地區
Express Shipping 對包含 2 或更多商品的訂單折扣為 $55.00
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| Registered Shipping | $10.00 / ：幾天天 | $10.00 / ：幾天天 |
|
：國家
Registered Shipping 對包含 2 或更多商品的訂單折扣為 $10.00
世界其他地區
Registered Shipping 對包含 2 或更多商品的訂單折扣為 $10.00
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積極的Excellent stone, exactly as pictured. No hidden imperfections. Strong colour saturation, accurate to pictures in good daylight. 100% would be a repeat buyer from Zayangems
為什麼用戶出價高於自己？
出價時，這是用戶願意為產品出價的最高金額。然後，我們的系統將代表該用戶自動出價，逐步提高出價以保持其作為最高出價者的地位，直至達到指定的最高價。
當出現“自動出價”圖標時，表示我們的系統正在根據用戶的最高出價主動為用戶出價。這可能看起來好像用戶出價高於自己，但這只是系統更新出價以反映用戶最高限額的結果。
