This is an attractive specimen consisting of large, transparent crystals of Calcite on small white Quartz crystals from Xianhualing, Hunan Province, China. Calcite is found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" - one that is found everywhere. Calcite is the principal constituent of limestone and marble. Name: Calcite on Quartz Specimen Size: Miniature-Sized Dimensions: 55x33x19 mm/ 2.2x1.3x.7 inches Weight: 21.2 Grams / 0.7 Ounces Origin: Mined in Xianhualing, Hunan Province, China Crystals, Miniatures, Igneous Rocks, White Quartz Crystal, Quartz Crystals, Quartz Cluster, White Quartz, Quartz Crystal