Opals
Gemstones
Jewelry
Coins
Sin piedras preciosas de reserva
Sin ópalos de reserva
Joyas sin reserva
Sin monedas de reserva
No has pujado en esta subasta.
Rare Demantoid Garnet 1.24 ct w Slight Horsetail Untreated Namibia Mine
- SKU
- Dimensiones (mm)
- 7.330 x 5.660 x 3.650mm
- Peso (cts)
- 1.240
- Treatment
- No Treatment
- Shape
- Oval
- Tipo
- Faceted
- Colores
-
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
- SKU
- Dimensiones (mm)
- 7.330 x 5.660 x 3.650 mm
- Peso (cts)
- 1.240
- Treatment
- No Treatment
- Shape
- Oval
- Tipo
- Faceted
- Colores
-
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
| Proveedor de envío | Envío a: país | Envíos al resto del mundo |
|---|---|---|
| FedEx | $35.00 / :días días | $35.00 / :días días |
|
:país
:proveedor tiene un descuento de $35.00 en pedidos con 2 o más artículos
Resto del mundo
:proveedor tiene un descuento de $35.00 en pedidos con 2 o más artículos
|
||
| Express Shipping | $55.00 / :días días | $55.00 / :días días |
|
:país
:proveedor tiene un descuento de $55.00 en pedidos con 2 o más artículos
Resto del mundo
:proveedor tiene un descuento de $55.00 en pedidos con 2 o más artículos
|
||
| Registered Shipping | $10.00 / :días días | $10.00 / :días días |
|
:país
:proveedor tiene un descuento de $10.00 en pedidos con 2 o más artículos
Resto del mundo
:proveedor tiene un descuento de $10.00 en pedidos con 2 o más artículos
|
||
-
PositivoOutstanding seller with top quality, well described merchandise and safe rapid delivery. Another great addition to my collection.
-
Positivo
Nice stone
-
Positivo
This sphene is beautiful. Flashes as described
¿Por qué los usuarios se superan a sí mismos?
Cuando se realiza una oferta, esta es la cantidad máxima que un usuario está dispuesto a ofertar por el producto. Luego, nuestro sistema ofertará automáticamente en nombre de ese usuario, aumentando gradualmente la oferta para mantener su posición como el mejor postor, hasta el máximo especificado.
Cuando hay un ícono que indica "Oferta automática", significa que nuestro sistema está realizando ofertas activamente para el usuario en función de su oferta máxima. Esto puede parecer como si los usuarios se estuvieran superando a sí mismos, pero es simplemente el resultado de que el sistema actualiza la oferta para reflejar el límite máximo de los usuarios.
Auditoría
-
Descripción Precisa
-
Imágenes precisas
Comments
The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.
Detalles de envío
Opciones de pago
Descripción general
También te puede interesar
De primera calidad
2 bids
Nuevo