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Allanite

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PDM737947

Allanite

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Description
Locality: 
Marosoritse, Antanimora Commune, Androy Region, Tuléar Province, Madagascar
Class: 
Single Crystal
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 6 × 3.6 cm
Description

Big prismatic crystal of “orthite” (an old name for allanites), with brown colour and an external reddish reaction rim. It is complete with rounded edges.

According to the associated label it was found by French geologist Georges Heurtebize in the 1950’s-1960’s.

Mineral Data
What's on the rock

Allanite

Synonym Of: 

Allanite-(Ce)

Formula: 
{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Hardness: 
5.5 - 6.0

Allanite-(La)

Formula: 
{CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Hardness: 
6.0

Allanite-(Y)

Formula: 
{CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Hardness: 
5.5 - 6.5

Current price

Starting price

10
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Start 12 Sep 18:00
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Shipping Information

Postage Area Price
Belgium
6.50
Europe, USA*
13.50
Asia, Oceania, N-S America*, Africa
22

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