Minerals identify

Know how to recognize them

Tourmaline

Cyclosilicate

Tourmaline ( /ˈtʊərməlɪn/ TOOR-mə-lin , -⁠leen boron compounded with elements such as aluminium , sodium. Tourmaline is classified as a semi-precious stone. This gemstone can be found in a wide variety of colors.

Identification

Color of mineral

Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Pink

Mohs scale ( mineral hardness )

7

Density ( specific gravity )

1.635
1.61

Luster ( interacts light )

Vitreous
Resinous

Crystal ( diaphaneity )

Trigonal