Whewellite

Refractive Index : 1.651 – 1.489

Optical Characteristic : DR, Biaxial positive

Specific Gravity : 2.25 – 2.19

Formula : Ca(C2O4).(H2O)

Crystal System : Monoclinic

Variety/Species : All

Species/Group : Whewellite

Birefringence : 0.159 – 0.163

Dispersion : 0.034

Hardness : 2.5 to 3

Toughness : Poor

Ultrasonic : Never

Steam : Never

UV Long : Inert

UV Short : Inert

Pleochroism : None

Strength : N/A

Pleochroism Colors : None

Heat : Sensitive

Acids : Sensitive

Light : Stable

Polish Luster : Vitreous to pearly

Fracture : Conchoidal

Fracture Luster :

Clarity Type : N/A

Tones : N/A

Saturations : N/A

Cause of Color :

Enhancements : None

Cleavage : Good in 1 direction

Color Range : Colorless, white, yellowish, brownish, Whitish

Transparency : Transparent to translucent

Phenomena : None

Separations : whewellite from-

Identifying Characteristics and information
Brittle. Very rare

Spectral Data
Not diagnostic

Trade Names and Misnomers
Calcium Oxalate
Whewellite

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