Tourmaline & Cleavelandite

Tourmaline – Na(Li,Al)₃Al₆Si₆O₁₈(BO₃)₃(OH)₄

Elements: Sodium, Lithium, Aluminum, Silicon, Oxygen, Boron, Hydrogen

Class: Silicates – Cyclosilicates

Crystal System: Hexagonal

Hardness: 7-7.5

Quartz

Talc (1)Diamond (10)

Very hard. Scratches glass and steel.

Cleavelandite – NaAlSi₃O₈

Elements: Sodium, Aluminum, Silicon, Oxygen

Class: Silicates – Tectosilicate

Crystal System: Triclinic

Hardness: 6-6.5

Orthoclase

Talc (1)Diamond (10)

Scratches glass. Harder than a steel knife.

Origin: Gerais Mine – Brazil

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