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Red Sunstone

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Chemical Formula

Microcline: KAlSi3O8
Oligoclase: (Na,Ca)Al1-2Si3-2O8

Color

Red, Orange, Brown, Pink

Hardness

6 - 6.5

Crystal System

Triclinic

Refractive Index

1.525 - 1.548

SG

2.62 - 2.65

Transparency

Transparent to translucent

Double Refraction

0.01

Luster

Vitreous

Cleavage

2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal

Mineral Class

Microcline or Oligoclase

 

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