Watermelon Tourmaline

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 7.0 – 7.5

Specific Gravity 2.9 – 3.4

Refractive Index 1.614 – 1.666

Crystal System Trigonal

Luster Vitreous

Cleavage None

Fracture Uneven,Irregular,Conchoidal,Sub-Conchoidal

Color various

Birefringence 0.014

Dispersion 0.017

Mohs Hardness

Mohs hardness of Watermelon Tourmaline shown against the ten reference minerals, from talc (1) to diamond (10).

Mohs	Reference mineral	Watermelon Tourmaline
1	Talc
2	Gypsum
3	Calcite
4	Fluorite
5	Apatite
6	Orthoclase
7	Quartz	●
8	Topaz
9	Corundum
10	Diamond

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Watermelon Tourmaline

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

Links may earn a commission at no extra cost to you.

About Watermelon Tourmaline

スイカトルマリンはトルマリンの変種で、結晶の断面がスイカの果肉を連想させるピンクから赤の内側と緑色の外側という同心円状の色帯を示すことから命名されました。このカラーゾーニングは結晶成長中の流体組成の変化によって生じます。ブラジル、ナイジェリア、マダガスカルが主要産地で、スライスした断面を見せる薄片標本や、ビーズ・カボション・ファセット石として宝飾品に人気があります。

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