Howlite is a whitish mineral that forms in some old lake beds as they dry up. When polished, it displays a web of gray to black spidery veins on its surface.
Howlite’s principle value in the jewelry trade is that it is very porous and absorbs dyes easily. Also, the dark veining in howlite looks similar to the matrix found in some turquoise, so it’s one of two stones dyed blue to simulate turquoise. It is also sometimes misrepresented as white turquoise.
The main commercial deposits of howlite are in Nova Scotia, Canada and California. Other deposits are found in Germany and Turkey.
Image courtesy of irocks.com.
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