mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 (Mohs scale), Color: Pale yellow to golden, Luster: Vitreous to waxy, Crystal Structure: Trigonal, Cleavage: Perfect rhombohedral
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Physical properties
Hardness: 3 (Mohs scale), Color: Pale yellow to golden, Luster: Vitreous to waxy, Crystal Structure: Trigonal, Cleavage: Perfect rhombohedral
Formation & geological history
Formed in sedimentary environments through chemical precipitation or as a primary mineral in igneous and metamorphic rocks, often found in hydrothermal veins.
Uses & applications
Used primarily for ornamental purposes, tumbled stones, meditation, and as a source of calcium in industrial chemical manufacturing.
Geological facts
Calcite is one of the most common minerals on Earth, but yellow varieties get their color from small amounts of iron impurities. It exhibits double refraction when in clear, rhombohedral forms.
Field identification & locations
Can be identified by its relative softness (scratched by a copper coin) and its effervescence (bubbles) when meeting a drop of weak acid such as vinegar. Look for a waxy feel in tumbled specimens.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral