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Siderite On Quartz

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PCZ544450

Siderite On Quartz

Description Tabs

Description
Locality: 
Penlee Quarry, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5.5 × 3 cm
Description

An interesting specimen that was collected from a crosscourse vein that runs through the centre of the quarry and is composed of a mass of small pseudo-hexagonal crystals on a thin coating of chalcedony on terminated quartz crystals up to 1.5 cm in length. From a less frequently offered Cornish locality.

 

Mineral Data
What's on the rock

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
Peter Crozier Minerals