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A Mars rover found this, hydrated calcium sulfate, indicating not Martian drywallers but Martian water |
gypsum
|
$800 |
J |
SCIENCE |
2013-10-04 |
#6680 |
|
(Jon of the Clue Crew holds a white rock at White Sands National Monument, New Mexico.) Because it's water-soluble, this form of calcium sulfate is rarely found in sand, but here in New Mexico's Tularosa Basin, there are no rivers to carry it away, so it forms the famed white sand |
gypsum
|
$1,000 |
J |
SCIENCE |
2008-03-28 |
#5430 |
|
This mineral found in plaster of Paris is No. 2 on the Mohs hardness scale |
gypsum
|
$400 |
J |
GENERAL SCIENCE |
1996-05-20 |
#2711 |