Ettringite, Oyelite
N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
4 x 4 x 2.5 cm. This fine miniature has crossing crystals, the largest 3.6 cm long, arranged like a bowtie at the front of a knob of matrix. The matrix is coated by a rolling carpet of soft white oyelite, and micro-hausmannites. The crystals have good lemon yellow color, translucency, and shimmering surface lustre.
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