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Sodalite & Nepheline

Sodalite – Na₄(Si₃Al₃)O₁₂Cl

Elements: Sodium, Silicon, Aluminum, Oxygen, Chlorine

Class: Silicates – Tectosilicates

Crystal System: Cubic

Hardness: 5.5-6

Orthoclase

Talc (1)Diamond (10)

Scratches glass. Harder than a steel knife.

Nepheline – Na₃K(Al₄Si₄O₁₆)

Elements: Sodium, Potassium, Aluminum, Silicon, Oxygen

Class: Silicates – Tectosilicates

Crystal System: Hexagonal

Hardness: 5.5-6

Orthoclase

Talc (1)Diamond (10)

Scratches glass. Harder than a steel knife.

Origin: Sar-e Sang, Koksha Valley – Afghanistan