Salts - Gypsum 

Page / - last modified by Roelof Zwaan on 2021/09/30 15:18 

Gypsum 
last modified by Roelof Zwaan
on 2021/09/30 15:18

Table of Contents

Gypsum is the most common sulfate mineral and differs from anhydrite in its water content. Gypsum has two water molecules attached to its sulfate molecules giving the following chemical name: CaSO4*2H2O. The mineral can be found in deposits together with halite, anhydrite, sulfur, calcite and dolomite.
Characteristics
Gypsum is clear colorless or clear white when pure. Impurities produce gray, yellow, red or brown. Its streak is white and gypsum has a vitreous, silky, sugary luster. Its hardness is soft, a 2 on Mohr's scale. It can be recognized by its perfect cleavage, low hardness and low specific gravity.
References
•	https://geology.com/
•	Bonewitz, Ronald Louis (2012). Rocks and Minerals. DK Publishing. p. 110. ISBN 978-0-7566-9042-7.
Gypsum

Type	Salt stone	
Chemical formula	CaSO4 *2 H2O	
Color	clear colorless or clear white	
Streak	White	
Luster	Vitreous, silky and sugary	
Hardness	Soft	
Cleavage	Perfect	
Image	Gypsum 	
Contents
•	Characteristics
•	References
•	Gypsum