mineral

Fluorite and Red Jasper

Fluorite (Calcium Fluoride, CaF2) and Red Jasper (Silicon Dioxide, SiO2)

Fluorite: Hardness 4 (Mohs), purple/green/yellow, vitreous luster, isometric crystal system, octahedral cleavage. Jasper: Hardness 6.5-7, opaque red, dull to greasy luster, trigonal microcrystalline structure.

Identified April 8, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite forms commonly in hydrothermal veins and granite pegmatites. Red Jasper is a variety of chalcedony that forms through the accumulation of silica in sedimentary or volcanic environments, enriched with iron oxide which provides the red color.

Uses & applications

Used in the manufacturing of optical lenses (Fluorite), as a flux in steel making, in the production of hydrofluoric acid, and widely as decorative gemstones and jewelry.

Geological facts

Fluorite gave its name to the phenomenon of fluorescence because many specimens glow under ultraviolet light. Red Jasper was known as the 'stone of endurance' in ancient cultures and was often used in Egyptian amulets.

Field identification & locations

Identify Fluorite by its softness (can be scratched by a knife) and characteristic purple hue; identify Red Jasper by its opaque deep red color and high hardness. Found globally, with major deposits in China, Mexico, South Africa, and the USA.

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