Star Quartz

Refractive Index : 1.553 – 1.544

Optical Characteristic : DR Uniaxial positive

Specific Gravity : 2.651 (+0.04 – 0.01)

Formula : SiO2

Crystal System : Trigonal

Variety/Species : Quartz

Species/Group : Quartz

Birefringence : 0.009

Dispersion : 0.013

Hardness : 7

Toughness : good

Ultrasonic : Usually safe

Steam : risky

UV Long : Inert

UV Short : Inert

Pleochroism : None

Strength : N/A

Pleochroism Colors : None

Heat : Avoid abrupt temperature change

Acids : Avoid hydrofluoric acid

Light : stable

Polish Luster : vitreous

Fracture : splintery to conchoidal

Fracture Luster : Vitreous to silky

Clarity Type : N/A

Tones : N/A

Saturations : N/A

Cause of Color : N/A

Enhancements : none

Cleavage : None

Color Range : Colorless, white, orange, purple, yellow, pink Yellosih, orangy, purplish, pinkish

Transparency : Semitransparent to semitranslucent

Phenomena : Asterism, 6 ray star

Separations : Star Quartz from-
Chalcedony: appearance, fracture, SG (possibly)

Topaz: RI, SG

Identifying Characteristics and information

Spectral Data
not diagnostic.

Trade Names and Misnomers
Asteriated Quartz
Star Quartz

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