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Rare Demantoid Garnet 2.39 ct Untreated Baluchistan Mine SKU 6
- SKU
- 寸法(mm)
- 9.280 x 6.680 x 4.770mm
- 重さ (CT)
- 2.390
- Treatment
- No Treatment
- Shape
- Oval
- タイプ
- Faceted
- 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 :)
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- SKU
- 寸法(mm)
- 9.280 x 6.680 x 4.770 mm
- 重さ (CT)
- 2.390
- Treatment
- No Treatment
- Shape
- Oval
- タイプ
- Faceted
- 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
| 配送業者 | 配送先Thailand | その他の国への配送 |
|---|---|---|
| FedEx | $35.00 / 2 | $35.00 / 5 |
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| Express Shipping | $55.00 / 2 | $55.00 / 5 |
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Express Shipping 、 2以上のアイテムを含む注文で$55.00に割引されます
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Express Shipping 、 2以上のアイテムを含む注文で$55.00に割引されます
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| Registered Shipping | $10.00 / 7 | $10.00 / 21 |
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Registered Shipping 、 2以上のアイテムを含む注文で$10.00に割引されます
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ポジティブWow! Beautiful color and fire! I can always count on Zayan Gems for wonderful gemstones and fast delivery.
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ポジティブ
Good gemstone and fast shipment as always, recommended seller
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ポジティブ
Nice stone, very happy.
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ポジティブ
Pretty gem, thank you:)
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ポジティブ
Very fast shipping. Extremely nice stone with lots of fire. Thanks so much!!
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ポジティブ
As described
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「自動入札」を示すアイコンがある場合、当社のシステムが入札者の最高入札額に基づいて入札者に代わって入札を行っていることを意味します。入札者が自らの入札額を上回る入札をしているように見えるかもしれませんが、これは入札者の最高額を反映するようにシステムが入札額を更新した結果にすぎません。
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Comments
The Verified Seller has provided accurate and honest pictures and details for this listing. Gem Rock Auctions is committed to holding our sellers to the highest standards of integrity and transparency. As part of this policy, we only permit the sale of natural, earth mined, gemstones. Many Gemstones have received treatments to enhance their color or clarity to further emphasize their beauty and we insist treatments are disclosed. Manmade, synthetic, and imitation gemstones are not permitted on Gem Rock auctions.
