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Grayite & Xenotime

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BCK506365

Grayite & Xenotime

Rare Mineral

Description Tabs

Description
Locality: 
Havey Quarries, Topsham, Sagadahoc County, Maine, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.6 cm
Description

You are bidding on a small sample of smoky quartz that has an embedded crystal group of xenotime (pale tan) with two attached (epitaxial?) bright orange crystal grains of very rare grayite. This is the best locality for this thorium phosphate mineral. There are also yellow needles of an unidentified uranium species. 

Mineral Data
What's on the rock

Grayite

Formula: 
(Th,Pb,Ca)(PO4)·H2O
Strunz: 
8.CJ.45
Hardness: 
0.0
Type Locality: 
Gooddays Mine (Good Days Mine), Mutoko parish (Mtoko), Mutoko District (Mtoko District), Mashonaland East, Zimbabwe

Xenotime

Synonym Of: 

Xenotime-(Y)

Formula: 
Y(PO4)
Strunz: 
8.AD.35
Hardness: 
4.0 - 5.0

Xenotime-(Yb)

Formula: 
(Yb,Y,HREE)(PO4)
Strunz: 
8.AD.35
Hardness: 
0.0

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