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  

Cryptomelane with Adamite

#PD32589

Cryptomelane with Adamite

#PD32589
Availability
Sold
Size
7 x 6 x 4 cm - Sm Cabinet 
Formula
K(Mn4+,Mn2+)8O16 (RRUFF)
Locality
Mina Ojuela, Mapimi, Durango, Mexico

A nice representation of an important manganese mineral - Cryptomelane, black botryoidal masses to 4mm throughout the specimen. Associated is Adamite encrusted with brown limonite.

Cryptomelane

Formula
K(Mn4+,Mn2+)8O16 
Crystal System
Monoclinic 
Crystal Habit
Cryptocrystalline, Botryoidal, Massive 
Luster
Sub Metallic 
Color
black, gray, blue gray 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
6-6.5 

Data courtesy of Webmineral.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2019 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map