3.1" Calcite Crystal Clusters on Galena Matrix - Missouri

This specimen contains clusters of light yellow colored calcite crystals of various sizes, all piled atop a galena matrix. The longest calcite crystal is 1.3" long.

About Calcite Crystals

Calcite crystals are a form of calcium carbonate (CaCO₃) known for their diverse shapes, transparency, and vibrant range of colors. They typically form in rhombohedral, scalenohedral, or prismatic shapes, often with well-defined, sharp edges and glossy surfaces. Calcite crystals are often translucent or transparent, sometimes displaying a double refraction effect where objects viewed through the crystal appear doubled. They can appear in various colors—white, clear, yellow, pink, blue, green, and orange—depending on impurities or trace minerals.

A notable characteristic of calcite is its reaction with weak acids like vinegar, which causes it to effervesce, or fizz, as it releases carbon dioxide. This property makes calcite crystals a key tool in geological identification and studies. Calcite forms in many environments, from sedimentary rocks like limestone and marble to hydrothermal veins.
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DETAILS
SPECIES
Calcite & Galena
LOCATION
Missouri
SIZE
3.1" long, 2.4" wide
CATEGORY
ITEM
#43842