Turquoise and Hematite

Physical Properties

Turquoise: Hardness 5-6, waxy to subvitreous luster, triclinic crystal system, robin's egg blue to green. Hematite: Hardness 5.5-6.5, metallic luster, hexagonal system, steel gray to black.

Formation & Geological History

Turquoise is a secondary mineral formed by the action of percolating acidic aqueous solutions during the weathering of pre-existing minerals. Hematite is typically formed in sedimentary environments via precipitation from water or as an oxidation product of iron-rich minerals.

Uses & Applications

Primary use is in jewelry, beads, and decorative lapidary arts. Hematite is also a major ore of iron.

Geological Facts

Turquoise is one of the first gemstones to ever be mined, with evidence dating back to Ancient Egypt (3000 BCE). Hematite is known for leaving a reddish-brown streak even when the stone itself is black.

Field Identification & Locations

Identify turquoise by its unique color and often present host rock 'matrix' (though these beads appear to be stabilized or dyed magnesite/howlite). Identify hematite by its metallic sheen and heavy weight (high specific gravity).

Identified on: 4/25/2026

Mode: Standard