First of all, Gypsum is a mineral, and Rock Gypsum is a rock, don't get them confused. Second of all, no they aren't. Rock Gypsum is a sedimentary rock, and an alternate name for it is Alabaster.
between 7 and 8
The Harmonized System (HS) code for gypsum is 2520.
The systematic name for gypsum is calcium sulfate dihydrate.
Gypsum is calcium sulfate - CaSO4.
there is one in fort dodge Iowa its called USG i think
At the Naica mine in Mexico, there are gypsum crystals 36 feet long and weighing 55 tons.
gypsum
They can get very large. In Mexico there were gypsum crystals discovered in an underground mine that measured over 30 feet in length.
No, gypsum is not metallic.
The address of the Gypsum Public Library is: 743 Valley Road, Gypsum, 81637 9722
The address of the Gypsum Community Library is: 521 Maple St., Gypsum, 67448 0019
Very widely is the short answer. If you have a crack at 'gypsum' in a reference work such as wikipedia, you'll find reference to the caves of giant gypsum crystals in the Naica mine in Mexico. These crystals are up to 12m long, 4m thick, and weigh up to 55 tons! But with a temp of just under 60oC and an RH of >>90%, time to explore is limited. Back to the Q, large evaporite deposits of gypsum are found near the surface of the earth.
Gypsum is found sea.
Yes, graphite is harder than gypsum, so it can scratch gypsum.
the luster for gypsum is Vitreous to pearly
gypsum is used in sheet rock