Demantoid

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First discovered in Russia's Ural Mountains in 1853, demantoid is the green variety of andradite garnet, and it carries higher dispersion than any other natural gemstone, diamond included, producing fiery spectral flashes even in subdued light. Russian material, identifiable by fibrous horsetail chrysotile inclusions, remains the most prized, while Namibia and Italy add further supply. It crystallizes in the isometric system and measures 6.5 on the Mohs scale, softer than many garnets but exceptional in brilliance. Moderately priced among the semi-precious gems, demantoid is regarded by many collectors as the most magnificent of all garnets.

Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 6,5

Specific Gravity 3,77 – 3,95

Refractive Index 1,88 – 1,89

Crystal System Isometric

Color various

Mohs Hardness

Mohs Hardness: 6,5

1 Soft10 Hard

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Demantoid

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

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About Demantoid

El demantoid es la magnífica variedad verde del granate andradita, reconocido por tener una dispersión más alta que cualquier otra piedra preciosa natural, incluido el diamante, lo que produce destellos espectrales ígneos visibles incluso con luz tenue. El demantoid ruso de los montes Urales, identificable por sus características inclusiones fibrosas de crisotilo en 'cola de caballo', sigue siendo el más apreciado, mientras que las fuentes de Namibia e Italia proveen suministro adicional. Descubierto por primera vez en Rusia en 1853, el demantoid es considerado por muchos coleccionistas como el más magnífico de todos los granates.