Calcite & Thomsonite from Aranga Quarry New Zealand

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This is an interesting piece of Calcite & Thomsonite, the Thomsonite is kind of noodle like while having associated growth of needle like Calcite over the top. Thomsonite is generally known to have associations of Prehnite, Laumontite, Natrolite, Chabazite, Analcime, Apophyllite and Chlorite.

I acquired this specimen from Tony at Mineral Store at the August 2016 Sydney Crystal Show.

Specimen Details

Chemical Formula: NaCa2Al5Si5O20 · 6(H2O)

ID #: JG0011

Colour: White, beige, cream, light yellow, light gray.

Hardness: 5 – 5.5

Acquisition Date: 06/08/2016

Crystal System: Orthorhombic

Lustre: Transparent to translucent

Dimensions: 90mm x 76mm x 20mm

Weight: 95g

Location: Aranga Quarry, Northland New Zealand

Rarity of Mineral

Rare

Did you know!?
Thomsonite is named in honour of Scottish mineralogist and chemist Thomas Thomson.

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