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Chalcedony Psm

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QRI770838

Chalcedony Psm

Pseudomorph

Description Tabs

Description
Locality: 
Trestia, Maramureș County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.2 × 4.5 × 0.6 cm
Largest Crystal: 
0.50cm
Weight: 
9.00gr
Description

Thin miniature featuring a drusy of cubic crystals of pale blue chalcedony, topped by a yellow-brown oxidation crust.

This is a known pseudomorph from Romania, although the mystery remains as it is chalcedony after melanophlogite or fluorite. If the former, this would make it among the largest melanophlogite ever existed. 

Back of the specimen is sawn. 

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

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