in old silver mines

The color runs evenly through the stone

This piece is shaped into a heart form with a flat base

and a bloodstone specimen

improved judgment

Blue Apatite Heart October Birthstone in old silver minesA heart carved from teal blue mineralsoft form, vivid color, unexpected geology. Blue Apatite is a calcium phosphate, Ca5(PO4)3(OH,F,Cl), Mohs 5. Gem quality blue is one of the rarer color expressions of the Apatite group; most natural Apatite is yellow, grey, or green. The teal to electric blue of this piece comes from trace rare earth elements in the crystal lattice, and the primary sources are Brazil and Madagascar. The mineral was named in the