Kutnohorite: Mineral Informaion
Kutnohorite
.jpeg "Kutnohorite: Mineral Informaion") |
| Kutnahorite Specimen From the Kalahari Manganese Field, Northern Cape, South Africa Photo: Rocks of Africa./E-rocks |
It is a hydrothermal mineral from low to medium temperature, it is often associated with other carbonates such as dolomite or ankerite with which it forms series. It is a mineral that is not used in any particular area, specimens are only for collection.It forms a series with dolomite, and with ankerite.
Kutnohorite occurs typically in manganiferous sediments, associated with rhodochrosite, aragonite and calcite.
Properties of Kutnohorite:
Class: Carbonates
Group: Dolomite
Chemical Formula: CaMn2+(CO3)2
Color is often pink or pinkish.
Luster is pearly to vitreous to dull.
Transparency crystals are translucent.
Crystal System is trigonal; bar 3
Crystal Habits include simple rhombs with curved faces, also massive and granular.
Cleavage is perfect in three directions forming rhombs.
Fracture is conchoidal.
Hardness is 3.5-4
Specific Gravity is 4.6 (above average for translucent minerals)
Streak is white to pale pink.
Notable Occurrences include Tuscany, Italy and Kank, Kutna Hora, Czech Republic.
Best Field Indicators are pink color, crystal habit and density.
Name: Named in 1901 by Antonín Bukovský for the type locality - Kutna Hora, Bohemia, Czech Republic.
.jpeg "Kutnohorite: Mineral Informaion") |
| Pink kutnohorite crystals from N'Chwaning II Mine, Kalahari Mn Field, South Africa Photo: © Weinrich Minerals. |
Properties of Kutnohorite:
Class: Carbonates
Group: Dolomite
Chemical Formula: CaMn2+(CO3)2
Color is often pink or pinkish.
Luster is pearly to vitreous to dull.
Transparency crystals are translucent.
Crystal System is trigonal; bar 3
Crystal Habits include simple rhombs with curved faces, also massive and granular.
Cleavage is perfect in three directions forming rhombs.
Fracture is conchoidal.
Hardness is 3.5-4
Specific Gravity is 4.6 (above average for translucent minerals)
Streak is white to pale pink.
Notable Occurrences include Tuscany, Italy and Kank, Kutna Hora, Czech Republic.
Best Field Indicators are pink color, crystal habit and density.
Name: Named in 1901 by Antonín Bukovský for the type locality - Kutna Hora, Bohemia, Czech Republic.
 |
| Kutnohorite Crystals. Wessels Mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Copyright © Rob Lavinsky |
.jpeg "Kutnohorite: Mineral Informaion") |
| Kutnahorite Specimen From the Kalahari Manganese Field, Northern Cape, South Africa Photo: Rocks of Africa./E-rocks |