mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Gaudefroyite

#CL62751

Gaudefroyite

#CL62751
Availability
Sold
Size
4.8 x 2.3 x 1.9 cm - Miniature 
Formula
Ca4Mn3+3(BO3)3(CO3)(O,OH)3 (RRUFF)
Locality
N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa

Highly lustrous, deeply striated Gaudefroyite crystals, the largest of which is 9mm.

Gaudefroyite

Formula
Ca4Mn3+3(BO3)3(CO3)(O,OH)3 
Crystal System
Hexagonal 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Adamantine - Resinous 
Color
black 
Streak
brown 
Class
Hexagonal - Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness

Data courtesy of Webmineral.

Collection
Chet S. Lemanski, Jr. Collection

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2024 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map