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Naegite

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SKY885051

Naegite

Rare Mineral

Description Tabs

Description
Locality: 
Naegi Pegmatite, Nakatsugawa, Gifu Prefecture, Honshu Island, Japan
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.8 × 0.5 × 0.5 cm
Description

Brown single crystal group og naegite, a variety of zircon.

From Mindat for neagite: "Greenish grey to greenish brown anhedral grains, crude crystals or spheroidal aggregates. Originally mis-described as a new U-Th-silicate, without having analyzed for Zr, but within a year it was found to really be a Y-Th-U-rich variety of zircon (or "cyrtolite"), completely metamict (X-ray amorphous). Weight % REE oxides roughly 5 < 9%, U and Th oxides each roughly 2 < 3%."

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Naegite

Variety Of: 

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Hardness: 
7.5
Hardness: 
0.0

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