In 'Moh's Scale' of hardness, Talc is at number 1, but what is number 2?
CaSO4·2H2O GYPSUM Gipsum CaSO4*2H2O Gypsum Calcium sulfate dihydrate
caso4·2h2o gipsum gypsum caso4 2h2o calcium sulfate dihydrate
gypsum
WikipediaEntity
GYPSUM