Apatite with Monticellite in Calcite Magnet Cove, Hot Spring County, Arkansas, USA Dimensions: 7.5 × 6.0 × 3.4 cm Provenance: Original collection label, catalog no. 545, identifying the specimen as apatite crystals with monticellite in calcite from Magnet Cove, Arkansas.
A substantial specimen composed of translucent, pearly white to pale champagne-colored crystalline material, with prominent stepped cleavage surfaces and intergrown radiating aggregates. Delicate fan-shaped sprays display a silky, reflective luster, while scattered dark brown to nearly black mineral inclusions provide contrast. Portions of the specimen exhibit warm honey-brown coloration alongside the paler crystalline matrix.
Apatite is a calcium phosphate mineral group commonly found in igneous and metamorphic environments, while monticellite is a calcium-magnesium silicate associated with high-temperature, calcium-rich rocks. Calcite frequently occurs alongside these minerals in chemically complex geological environments.
Magnet Cove, Arkansas, is internationally recognized for its unusual alkaline igneous complex and remarkable diversity of mineral species. Its distinctive geological setting has produced numerous uncommon mineral associations, making it one of the most historically significant mineral-collecting districts in the southern United States.
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