Home Gypsum
V - Sulfates
Crystal habit of Gypsum Crystal habit of Gypsum Gypsum Gypsum

Name   Gypsum
Chemistry   Ca[SO4]·2H2O
Hardness   1,5 - 2
Lustre   pearly, vitreous
Colour   colourless, white, rarely coloured
Streak   white 
Density [g/cm3]   2.3 - 2.4
Crystal habit   monoclinic, crystals [010], [120], [011], twins [100] = swallow tail twin,, [001] = Montmatre twin
Cleavage, Fracture   [010] perfect, [111] distinct (fracture fibrous), [100] distinct (fracture conchoidal)
other characteristics and occurrences   massive, coarse spathic, fibrous (satin spar), dense (alabaster), crystals often bend

This page in German - Diese Seite in Deutsch
© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.