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Fluorite With Quartz & Siderite

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BMM659115

Fluorite With Quartz & Siderite

Description Tabs

Description
Locality: 
West Cumberland Area, Cumbria, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
17 × 12.5 × 7.5 cm
Description

Large transparent purple cubic fluorite crystals (up to 60 mm long) with crusts of lustrous transparent colorless quartz crystals (up to 4 mm long) on matrix with sparkling brown-blue siderite crystals (up to 1 mm long). The piece was found in the 60s. The backside is also well crystalized with smaller fluorite crystals. Perfect and undamaged – the bottom and the sides were extracted from the rock.

Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Quartz

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

Siderite

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