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
Checkout
1 item @ $25.00   30:00
Home | My Cart | Login | Register

Geigerite

#BAC61755
SOLD
Geigerite from Monte Nero mine, Rocchetta Vara, La Spezia Province, Italy - BAC61755
Geigerite from Monte Nero mine, Rocchetta Vara, La Spezia Province, Italy - BAC61755

Geigerite

#BAC61755
Availability
Sold
Size
1 x 1.2 x 1.3 cm - Thumbnail 
Formula
Mn2+5(AsO4)2(AsO3OH)2·10H2O (RRUFF)
Locality
Monte Nero mine, Rocchetta Vara, La Spezia Province, Italy
Tagged
arsenate

Colorless, platy and striated crystals measuring less than 0.5mm across the 1cm face of specimen. Geigerite is a rare arsenate mineral from eight known localities.

Geigerite

Formula
Mn2+5(AsO4)2(AsO3OH)2·10H2O 
Crystal System
Triclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
red, colorless 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
3 

Data courtesy of Webmineral.

Collection
William & Anne Cook Collection
Mineralpedia
View Geigerite
On Dakota Matrix
Previously Sold Geigerite
On Dakota Matrix
Other Available Geigerite
WebMineral
View Geigerite
Mindat
View Geigerite

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2025 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map