SKU: 85640951607

Hydroxyapophyllite

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Description

HydroxyapophylliteLocale: 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

Locale: 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 wulfenite, and can be colorless to semi-translucent white with inclusions.

This specimen has a cluster of intersecting hydroxyapophyllite crystals topped with a cluster of small scalenohedral calcite crystals. The matte light brown mineral coating is lizardite, which often grows in small spots along the junctions of the hydroxyapophyllite crystal. Calcite covers the back of the specimen. The dark matrix is likely manganese-based; the N'Chwaning mines were established to extract the rich manganese ore in the area. The coffee-brown staining may be iron.

UV reactivity Some calcite fluoresces and phosphoresces weak red under 365 nm UV light. It can cause the hydroxyapophyllite crystals growing over it to glow a faint red—try it in a dark room with a strong flashlight.

** Brittle warning! Hydroxyapophyllite specimens are somewhat delicate and may shed pieces; limit handling.

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SKU: 85640951607

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