HALITE on sylvinite

2 1/4" L x 1 1/2" W x 1" T (small cabinet). Nice 1" purple-zoned halite crystal perched  on sylvinite (rock mixture of halite and sylvite). Incredibly rare blue and purple colors in halite. Best in the world.

Halite is salt and will melt on contact with high moisture, including high humidity. However, these specimens are not evaporite crystals and are quite stable if protected from high humidity. Of course, they are best in dry, arid climates. It's a good idea to mount in a plastic see-through box and keep in a sealed cabinet. Just don't expose to your tea kettle or steam bath, and they will last your lifetime. CLOSED LOCALITY. See article in Mineralogical Record February 2013.