Chrome-Tourmaline

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Physical & Optical Properties

Mohs Hardness 7,0 – 7,5
Specific Gravity 2,85 – 3,35
Refractive Index 1,614 – 1,666
Crystal System Trigonal
Luster Vitreous
Color various
Birefringence 0,014
Pleochroism Strong: dark green - yellow-green

Mohs Hardness

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

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Chrome-Tourmaline

Chrome tourmaline is an intensely colored green to yellowish-green variety of elbaite or dravite tourmaline with chromium and vanadium as the primary chromophores, producing colors similar to—and often confused with—fine emerald. The finest material comes from Tanzania and Kenya's Umba River Valley, where transparent, deeply saturated stones in 1–3 carat sizes command premium prices. Its richer, more vivid green compared to ordinary green tourmaline makes it one of the most sought tourmaline varieties.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Chrome-Tourmaline?
Chrome tourmaline is an intensely colored green to yellowish-green variety of elbaite or dravite tourmaline with chromium and vanadium as the primary chromophores, producing colors similar to—and often confused with—fine emerald. The finest material comes from Tanzania and Kenya's Umba River Valley,
What is the hardness of Chrome-Tourmaline?
Chrome-Tourmaline has a Mohs hardness of 7.0 to 7.5, making it excellent for use in jewelry.
What color is Chrome-Tourmaline?
Chrome-Tourmaline is primarily Various.
How much does Chrome-Tourmaline cost?
Chrome-Tourmaline falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Chrome-Tourmaline?
Chrome-Tourmaline belongs to the Trigonal crystal system.

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