Gypsum

Question 1

What is gypsum’s formula?

Answer 1

CaSO4x2H2O

Question 2

What is gypsum’s crystal system?

Answer 2

Monoclinic

Question 3

What is gypsum’s hardness?

Answer 3

2.0

Question 4

What is crystallography of gypsum?

Answer 4

three unequal cleavages
swallow-tail twins {100}
perfect {010} cleavage

Question 5

What is gypsum’s 3 occurrences?

Answer 5

sedimentary beds in evaporite sequences
veins or scattered masses in clay and shale
gangue in hydrothermal veins

Question 6

What is gypsum’s use?

Answer 6

plaster of Paris