Andradite

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 3,7 – 4,1
Refractive Index 1,88 – 1,94
Crystal System Isometric
Luster Subadamantine,Vitreous
Cleavage None
Fracture Conchoidal
Color various
Dispersion 0,057

Mohs Hardness

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

About Andradite

Andradite is a calcium iron garnet species renowned for having higher dispersion than diamond, producing fiery spectral flashes of color in its transparent gem varieties. Its three primary gem varieties—demantoid (green), topazolite (yellow), and melanite (black)—span a remarkable range of appearances from the world's most prized green garnet to an opaque black used in Victorian mourning jewelry. The finest green demantoid, with characteristic horsetail inclusions, comes from Russia's Ural Mountains.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Andradite?
Andradite is a calcium iron garnet species renowned for having higher dispersion than diamond, producing fiery spectral flashes of color in its transparent gem varieties. Its three primary gem varieties—demantoid (green), topazolite (yellow), and melanite (black)—span a remarkable range of appearanc
What is the hardness of Andradite?
Andradite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Andradite?
Andradite is primarily Various.
How much does Andradite cost?
Andradite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Andradite?
Andradite belongs to the Isometric crystal system.

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