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 Bournonite

Reset

Bournonite

Bournonite

Named to honor French mineralogist and crystallographer Jacques Louis de Bournon. Bournonite is relatively common and can be found in hydrothermal veins of medium temperatures in localities in England, Ireland, Germany, the Czech Republic, Romania, France, Bolivia, Peru, the United States, Mexico, Australia, Japan, and China, among several others. Assocaited minerals include galena, tetrahedrite, sphalerite, chalcopyrite, pyrite, stibnite, zinkenite, siderite, quartz, rhodochrosite, dolomite, and baryte.

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

Formula
CuPbSbS3 
Crystal System
Orthorhombic 
Crystal Habit
Platy, Pseudo Cubic, Cog-wheel 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
WebMineral
View Bournonite 
Mindat
View Bournonite 

Bournonite from Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru

Bournonite
            from Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru

Cogswheel twinned Bournonite crystals each to about 1.5 cm long by at 1cm across the prism axis.

Click thumbnail images for larger view.

Bournonite from Cavnic, Maramures Co., Romania

Bournonite
            from Cavnic, Maramures Co., Romania
Special Info
Cooke Collection

Numerous little stout crsystals to 2-6mm of Bournonite showing crude to well-developed classic cogwheel twinning and deep striations on the prism faces. Associated with Pyrite and drusy Quartz and Sphalerite (most of the matrix).

Click thumbnail images for larger view.

Bournonite from Pribram, Bohemia, Czech Republic

Bournonite
            from Pribram, Bohemia, Czech Republic
Special Info
Antique Specimen

Tabuler, twinned Bournonite crystal to 1cm and a few smaller on Siderite matrix. Comes with an old Conklin label and another old inked label accidentally torn.

Click thumbnail images for larger view.

Bournonite from Casapalca, Lima Dept., Peru

Bournonite
            from Casapalca, Lima Dept., Peru

Large silver-gray Bournonite crystals to over 1cm with classic cogwheel twinning with small quartz crystals scattered on some of the larger crystals, giving a nice contrast to the steel grey Bournonite. 

Click thumbnail images for larger view.

Bournonite from Pachapaqui dist, Bolognesi prov., Ancash dept., Peru

Bournonite
            from Pachapaqui dist, Bolognesi prov., Ancash dept., Peru

Silvery cyclic twinned crystals to 5mm with Quartz.

Click thumbnail images for larger view.

Bournonite from Valea Vinului mine, Rodna Mtn., Bistrița-Năsăud Co., Romania

Bournonite
            from Valea Vinului mine, Rodna Mtn., Bistrița-Năsăud Co., Romania

A nice combination specimen with very reflective and excellent Bournonite crystals perched on the Galena. The group of Bournonite measures 1.5cm and the Galena is 1.7cm. Also associated with Quartz and Pyrite.

Click thumbnail images for larger view.

Bournonite from Mitsumine, Chichibu-Gun, Saitama, Japan

Bournonite
            from Mitsumine, Chichibu-Gun, Saitama, Japan

This is a short prismatic highly reflective Bournonite crystal terminated on both ends. 

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