added on 10/23/2024

Guimaraesite, Quartz

Guimaraesite is a newly described complex calcium/zinc/magnesium/iron beryllium phosphate, which comes from an unnamed pegmatite working in this valley. This specimen is a complete floater quartz cluster the size of a large grapefruit, with exception only of one small bit on one side which is contacted. It is smothered on one side by Guimaraesite in sub-mm spherical crystal clusters. This is the first rich specimen I have seen. Described in 2006.

Locality

Brazil, Minas Gerais, Taquaral

Species

Quartz

SizeCabinet

Comments

Known provenance

Date

Owner

Price

Note

2024/08

Unknown

Not disclosed

—

Unknown

The Arkenstone

Not disclosed

—

2024/08UnknownNot disclosed—

UnknownThe ArkenstoneNot disclosed—

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