A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Bournonite with siderite from Neudort, Germany |
|---|---|
| Description | Bournonite, CuPbSbS3 (copper lead antimony sulfide), with siderite (brownish material making up most of the specimen). Bournonite (several small steel gray grains in this specimen) is also called “cog wheel ore” because of the cog wheel shape that the twinned crystals form. Twinning is common in bournonite and if a crystal repeatitively twins it can form a type of twin called a trilling. This specimenis 7 cm across. |
| Location | Germany. Near Neudort. |
| Photographer | Darla Sondrol. 2001-07-11. |
| Collection | University of North Dakota Mineralogy Collection #261. |
| Key words | bournonite, siderite, Germany |
| Tech details | 742 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1143 |
 | |