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Phlogopite On Tridymite

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PJM46587

Phlogopite On Tridymite

Description Tabs

Description
Locality: 
Lake Taupo, Taupo District, Waikato Region, North Island, New Zealand
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2 × 4.1 × 3 cm
Description

Two cavities in a banded rhyolite are lined with whitish tridymite crystals onto which dark reddish brown phlogopite crystals have formed.

Mineral Data
What's on the rock

Phlogopite

Formula: 
KMg3(AlSi3O10)(OH,F)2
Strunz: 
9.EC.20
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 3.0
Streak: 
White

Tridymite

Formula: 
SiO2
Strunz: 
4.DA.10
Crystal System: 
Triclinic - Pedial
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico
Earthstones Australia

Seller Information

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All goods must be paid for prior to shipping, all bids are binding.