2.5" Orange Creedite Crystal Cluster on Fluorite - Durango, Mexico

Orange Creedite Crystal Cluster on Fluorite - Durango, Mexico #51651

This is a cluster of radiating orange creedite crystals. The creedite crystals are transparent, with orange limonite inclusions that give them their color. The underside of this specimen contains remnants of fluorite, including small purple-green octahedral crystals that fluoresce under UV light. This specimen was collected from the Navidad Mine near Durango, Mexico.

Creedite is a complex aluminum salt with the chemical formula of Ca3SO4Al2F8(OH)2 · 2H2O. It typically forms from metamorphic rock as a fluorite oxidation in fluorite ore deposits. Generally crystals form in radial aggregations, but under rare circumstances will form as single prismatic crystals up to 1 millimeter long. Creedite has been found in a variety of different colors, but most often displays orange, purple, or clear colorless crystals.

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