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Gummite Uraninite & Cyrtolite

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UVM574659

Gummite Uraninite & Cyrtolite

Radioactive

Description Tabs

Description
Locality: 
Ruggles Mine, Grafton, Grafton County, New Hampshire, United States of America
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.3 × 4.3 cm
Description

A classic specimen of uraninite with gummite and zircon var. crytolite from the Ruggles Mine!  Around the matrix, small black grains of uraninite can be seen altering to colorful gummite.   Under magnifications, small brown crystals of cyrtolite (A metamict variety of zircon) can be found.  

Mineral Data
What's on the rock

Uraninite

Formula: 
UO2
Strunz: 
4.DL.05
Crystal System: 
Isometric
Hardness: 
5.0 - 6.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Cyrtolite

Variety Of: 

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Hardness: 
7.5
Formula: 
Zr[(SiO4),(OH)4]
Hardness: 
0.0

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