KUTNOHORITE

Chemistry: Ca(Mn, Mg, Fe)(CO3)2, Calcium Magnesium Carbonate.
Class: Carbonates
Group: Dolomite
Uses: Only as mineral specimens
Specimens

Kutnohorite, or also spelled as kutnahorite, is a rare carbonate mineral. It is a member of the dolomite group and is difficult to distinguish from dolomite except for the increased density in kutnohorite. Kutnohorite is named after it type locality which is near Kutna Hora in the Czech Republic.

PHYSICAL CHARACTERISTICS:

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.