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Rare Certified 2.63 ct Andradite Garnet Tanzania SKU-2
- UGS
- Dimensions (mm)
- 8.030 x 9.000 x 4.790mm
- Poids (cts)
- 2.630
- Certificate Gem Lab
- AIG
- Treatment
- No Treatment
- Shape
- Heart
- Taper
- Faceted
- Certified Gemstones
- Oui
- Couleurs
-
Andradite was named after Brazilian mineralogist José Bonifácio de Andrada e Silva, credited with the mineral’s discovery — but more on that later.
Since andradite is a garnet, you can use this gem as a:
Zodiac stone for supporting the Aquarius, Capricorn, and Scorpio signs in astrology.
Wedding anniversary stone for celebrating two years of marital bliss.
Switching gears, let's take a look at the mineral traits that make andradite a unique member of the garnet family.
Andradite Specifications & Characteristics
Andradite is the final member of the ugrandite garnet series, a group of calcium-iron garnets consisting of andradite, grossular, and uvarovite garnets. This series includes some of the most valuable and prized garnets and provides clues about the history of the rock they're found in.
The andradite formula is Ca3Fe3+2(SiO4)3, representing its chemical composition of calcium, iron, silicon, and oxygen. This chemical composition gives andradite unique physical and optical properties, like its high refractive index and durability.
Here’s an overview of andradite’s mineral data:
Mohs hardness: 6.5 to 7.5
Color: Yellow, greenish-yellow to emerald-green, dark green; brown, brownish-red, brownish-yellow; gray to black; sometimes sectored
Crystal structure: Isometric/cubic
Luster: Vitreous, resinous, or near-adamantine
Transparency: Transparent to translucent
Refractive index: 1.88 to 1.91
Density: 3.70 to 4.10
Fracture: Conchoidal to uneven
Tenacity: Brittle
Streak: White
Treatments: Heat (to enhance color)
Types of Andradite
Although andradite is a type of garnet, it also encompasses a range of distinct varieties, each with its own characteristics:
Colophonite
A brown, red, or orange granular variety with a resinous, amber-like luster.
- UGS
- Dimensions (mm)
- 8.030 x 9.000 x 4.790 mm
- Poids (cts)
- 2.630
- Certificate Gem Lab
- AIG
- Treatment
- No Treatment
- Shape
- Heart
- Taper
- Faceted
- Certified Gemstones
- Oui
- Couleurs
-
Andradite was named after Brazilian mineralogist José Bonifácio de Andrada e Silva, credited with the mineral’s discovery — but more on that later.
Since andradite is a garnet, you can use this gem as a:
Zodiac stone for supporting the Aquarius, Capricorn, and Scorpio signs in astrology.
Wedding anniversary stone for celebrating two years of marital bliss.
Switching gears, let's take a look at the mineral traits that make andradite a unique member of the garnet family.
Andradite Specifications & Characteristics
Andradite is the final member of the ugrandite garnet series, a group of calcium-iron garnets consisting of andradite, grossular, and uvarovite garnets. This series includes some of the most valuable and prized garnets and provides clues about the history of the rock they're found in.
The andradite formula is Ca3Fe3+2(SiO4)3, representing its chemical composition of calcium, iron, silicon, and oxygen. This chemical composition gives andradite unique physical and optical properties, like its high refractive index and durability.
Here’s an overview of andradite’s mineral data:
Mohs hardness: 6.5 to 7.5
Color: Yellow, greenish-yellow to emerald-green, dark green; brown, brownish-red, brownish-yellow; gray to black; sometimes sectored
Crystal structure: Isometric/cubic
Luster: Vitreous, resinous, or near-adamantine
Transparency: Transparent to translucent
Refractive index: 1.88 to 1.91
Density: 3.70 to 4.10
Fracture: Conchoidal to uneven
Tenacity: Brittle
Streak: White
Treatments: Heat (to enhance color)
Types of Andradite
Although andradite is a type of garnet, it also encompasses a range of distinct varieties, each with its own characteristics:
Colophonite
A brown, red, or orange granular variety with a resinous, amber-like luster.
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PositifHappy with this one
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Positif
Good stone and fast shipment. Thx
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Positif
Superb service with delivery. Item as shown
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Positif
Outstanding seller with top quality, well described merchandise and safe rapid delivery. Another great addition to my collection.
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Lorsqu'il y a une icône indiquant "Enchère automatique", cela signifie que notre système place activement des enchères pour l'utilisateur en fonction de son enchère maximale. Cela peut donner l'impression que les utilisateurs surenchérissent eux-mêmes, mais c'est simplement le résultat de la mise à jour de l'enchère par le système pour refléter la limite maximale des utilisateurs.
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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.
