mineral

Specularite in Quartz

Specular Hematite (Fe2O3) in Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 5-6 (Specularite), 7 (Quartz). Color: Silver-black metallic with iridescent blue highlights on white/clear matrix. Luster: Metallic to vitreous. Crystal structure: Hexagonal/Trigonal.

Hardness: 5-6 (Specularite), 7 (Quartz)
Luster: Metallic to vitreous

Identified July 7, 2026More mineral →

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Physical properties

Hardness: 5-6 (Specularite), 7 (Quartz). Color: Silver-black metallic with iridescent blue highlights on white/clear matrix. Luster: Metallic to vitreous. Crystal structure: Hexagonal/Trigonal.

Formation & geological history

Formed in hydrothermal veins or through metamorphism of iron-rich sedimentary rocks. The specular hematite occurs as plate-like micaceous crystals embedded within quartz grains.

Uses & applications

Primarily collected as mineral specimens; specularite is also a minor iron ore and sometimes used in cosmetics or as decor.

Geological facts

The name 'specularite' comes from the Latin 'speculum' (mirror) because the flat metallic crystals are highly reflective and were used as early mirrors.

Field identification & locations

Identified by its distinctive metallic 'glitter' or flake-like appearance and the red-brown streak it leaves on a porcelain plate. Common in Iron Range regions like Michigan or Brazil.