Tourmaline

Complex borosilicate

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Tourmaline is a group of complex borosilicate minerals famous for their wide range of colors. Watermelon tourmaline shows pink centers with green rims. The most common variety, schorl (black), accounts for 95% of all tourmaline.

النظام البلوري	Trigonal
صنف المعدن	09 Silicates
صلادة موس	7.0-7.5
الكثافة النوعية	2.82-3.32
اللون	Black, green, pink, blue, watermelon
اللمعان	Vitreous
لون الخط	Colorless
الانفصام	None
الكسر	Conchoidal to uneven
الشفافية	Transparent
الشكل البلوري	Prismatic with triangular cross-section