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Chalcedony

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MMM85177

Chalcedony

Description Tabs

Description
Locality: 
Royal Restormel Mine, Lostwithiel, Cornwall, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2 × 4 × 2 cm
Description

A small but interesting specimen displaying pale blue chalcedony on goethite matrix.

Mineral Data
What's on the rock

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey