Tincalconite. Borax Lake (Big Borax Lake). Clear Lake Oaks. Sulphur Creek District (Sulfur Creek District; Wilbur Springs ...

Description

Tincalconite
Borax Lake (Big Borax Lake)
Clear Lake Oaks
Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co.
California, USA
2.11 x 0.57 x 0.43 inches (5.36 x 1.45 x 1.10 cm)

This geometric elongated crystal of Tincalconite is obviously similar to Borax and looks much like a stick of chalk that has flat sides, rather than a rounded exterior. This white mineral comes from a number of places in California, though this is not from the type locality. It was named for its powdery composition.

[Scale: 1 inch, with mark at 1 cm]

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