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  

Mineralpedia Details for Botallackite

Reset

Botallackite

Botallackite

Named for the Botallack mine where the mineral finds its type locality in Wheal Cock in the St. Just district of Cornwall, England. Additional localities for Botallackite include additional English localites, Scotland, Ireland, Germany, Greece, South Africa, the United States, and long the Mid-Atlantic Ridge in the TAG Hydrothermal Field, among a few others. It can be found in copper-bearing deposits with high chlorine concentrations or have been exposed to seawater, as a reaction product of slag in seawater, and a weathering product of sulfides in black smoker deposits. Botallackite is found in association with atacamite, paratacamite, gypsum, brochantite, and connellite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/botallackite.pdf

Formula
Cu2Cl(OH)3 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Color
blue green, green, light blue green, light green 
Streak
light green 
Class
Monoclinic - Prismatic 
Hardness
WebMineral
View Botallackite 
Mindat
View Botallackite 

Botallackite from Botallack mine, St. Just dist., Cornwall, England

Botallackite
            from Botallack mine, St. Just dist., Cornwall, England

Originally described in 1865 and generally thought to be Atacamite, Botallackite (monoclinic) is actually polymorphous with Atacamite(Ortho). These crystals to about 0.5mm are composed of stacked, thin plates, much like an uneven and fanned deck of cards.

Click thumbnail images for larger view.

Botallackite from Levant mine, St. Just dist., Cornwall, England

Botallackite
            from Levant mine, St. Just dist., Cornwall, England

Pearly light green flat lying bladed Botallackite crystals to 5mm long.

Click thumbnail images for larger view.

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