Calcite on Prehnite Crystal Cluster | 96 grams | Mumbai, India Tetrahedrite Shape: Oval Facet

Shape: Oval Facet

Guizhou Provence

superb shape and is a good size

very few specimens show any crust

The impact mixed broken fragments of surface eucrites with iron and olivine from deep within the body

Calcite on Prehnite Crystal Cluster | 96 grams | Mumbai, India Tetrahedrite Shape: Oval FacetCalcite 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. Penhnite can form prismatic, tabular, or pyramidal crystals, but usually occurs in botryoidal, reniform, stalactitic, granular, or compact habits. It is usually green in colour, but may be white, colourless, yellow, or