mineral
Polished/polished rough quartz crystal, likely hematoid or included quartz
Quartz (SiO₂), with probable iron-oxide inclusions; possibly smoky or rose-tinted quartz
AI-generated identification · may be incorrectTranslucent gray-brown to pink-orange body with vitreous luster, conchoidal fracture, and partial crystal faces. Mohs hardness 7; hexagonal crystal structure; no cleavage; specific gravity about 2.65. Strong lighting and surface wear make exact color assessment uncertain.
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Physical properties
Translucent gray-brown to pink-orange body with vitreous luster, conchoidal fracture, and partial crystal faces. Mohs hardness 7; hexagonal crystal structure; no cleavage; specific gravity about 2.65. Strong lighting and surface wear make exact color assessment uncertain.
Formation & geological history
Quartz crystallizes from silica-rich hydrothermal fluids in cavities, veins, and pegmatites; red-brown inclusions are commonly hematite or limonite. Quartz ranges from Precambrian to modern geological settings and cannot be age-dated from this photograph.
Uses & applications
Used for jewelry, carvings, lapidary pieces, countertops, glass, electronics, and industrial abrasives. This small included specimen has modest decorative and collector interest.
Geological facts
The translucent zones and angular crystal geometry distinguish quartz from ordinary glass. Iron oxides can produce red, orange, brown, or black internal patches.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and curved fracture surfaces; avoid relying on a scratch test if the piece is valuable. Common worldwide in hydrothermal veins, geodes, and pegmatites.
