28 Minerals added!
Cassiterite with limonite - Llallaqua Mine Bustillos Province Potosi Bolivia
Calcite with graphite and wollastonite Drum Valley Tulare County California USA
Calcite var Honey Onyx, Calcium carbonate, McCamey, Upton County, Texas, USA
Calcite var Chalk, Calcium carbonate, White Cliffs of Dover, England
Calcite var Chalk Calcium carbonate Barton Lime County Barton Bedfordshire England
Calcite Psuedomorph Dinosaur Bone, Yellow Cat Mining District, Grand County, Utah,USA