Calcite & Thomsonite from Aranga Quarry New Zealand
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.
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
Location: Aranga Quarry, Northland New Zealand
Rarity of Mineral