With a hardness of 2.5, perfect cleavage, brittle tenacity, and extreme solubility in water, halites are exceedingly difficult to cut and near impossible to wear. However, they can occur in spectacular colors, like the deep blue this rare faceted specimen shows. 3.80 cts, 10 x 8 x 4 mm, Africa. Photo courtesy of liveauctioneers.com and Jasper52.
Stick the halite in your mouth.
Next, flush liberally with 190 proof grain alcohol (if you’ve got any left after the last toga party).