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This material is brittle and may shed pieces
B 3 inches
there is an interesting formation of small needles made of round forms growing from the botryoidal hyalite
It especially highlights structure of the hydroxyapophyllite crystals of this piece
with banding distinct in both the UV and daylight fluorescence images
Hydroxyapophyllite Pyrite This material is brittle andLocale: N'Chwaning II Mine, South Africa Approx dimensions: 2. 25 x 1 x . 75" Approx weight: 30g This specimen features hydroxyapophyllite crystals with lizardite and calcite on matrix. Properly called "hydroxyapophyllite (K)," hydroxyapophyllite is a variety of apophyllite that is typically colorless. It more frequently grows cubic crystals, but these specimens from the renowned N'Chwaning Mines region form tabular square crystals similar to
