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Gummite & Uraninite

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UVM623885

Gummite & Uraninite

Radioactive

Description Tabs

Description
Locality: 
Ruggles Mine, Grafton, Grafton County, New Hampshire, United States of America
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.8 × 1.4 cm
Description

Black masses of uraninite surrounded by colorful blebs of secondary uranium minerals, collectively referred to as gummite.   An attractive specimen from a classic locality.

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

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