Demantoid

Demantoid is a garnet gemstone  variety with an emerald-green color and mesmerizing, diamond-like sparkle. It’s known for being the most brilliant and currently most valuable garnet variety.

• 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

• Specific Gravity: 3.81-3.89

• Cleavage: None

• Fracture: Conchoidal

• Streak: White

• Luminescence: None

• Optical effects: Rarely chatoyancy

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