431g / 0.950lbs / 15.20oz
3.31" x 1.00" x 5.23"
Calcite is a calcium carbonate mineral with a hardness of 3. Calcites are among the most varied and abundant crystals, and they occur in a wide variety of forms and colors. The molecular structure of the crystals is rhombohedral, but specimens can appear as scalenohedrons, rhombohedrons, prisms, masses, stalactites, etc. Calcite makes up a major part of most marbles and limestones. Calcite crystals are found on every continent.