Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Fergusonite-(Y) Var Risörite

Views:
Watches:
MCH157893

Fergusonite-(Y) Var Risörite

Radioactive

Description Tabs

Description
Locality: 
Risør, Agder, Norway
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.1 × 0.8 cm
Description

A specimen covered richly with black risörite, a variety of fergusonite-(Y). The black crystal is 0.4 cm in size.

The specimen is from the collection of the French mineralogist A.A. Damour and was collected probably around 1830–1840 (no label about that).

Mineral Data
What's on the rock

Fergusonite-(Y)

Formula: 
YNbO4
Strunz: 
7.GA.05
Hardness: 
5.5 - 6.5
Type Locality: 
Kangeq, Sermersoq Island, Kujalleq, Greenland

Risörite

Variety Of: 

Fergusonite-(Y)

Formula: 
YNbO4
Strunz: 
7.GA.05
Hardness: 
5.5 - 6.5
Formula: 
(Y,Er)(Nb,Ti,Ta)(O,OH)4
Hardness: 
0.0

Seller Information

Payment options: offline, paypal_wpp, paypal_wps