3.1" Calcite Crystal Cluster with Hematite - Fluorescent!

This is a beautiful cluster of dogtooth crystals that are orange tinted from hematite. This specimen was collected from the Fengjiashan Mine in Hubei, China. Under long wave UV, these crystals react by fluorescing a vibrant orange color.

The green mineral is unknown, though a potential candidate based on color and location is manganbabingtonite.

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
LOCATION
Fengjiashan Mine, Hubei Province, China
SIZE
3.1 x 2.1"
CATEGORY
ITEM
#179948