sedimentary/metamorphic

Jasper or Agatized material

Microcrystalline Quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale. Yellow-orange to brownish color, waxy to dull luster. Microcrystalline structure, conchoidal fracture.

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Physical properties

Hardness of 6.5-7 on the Mohs scale. Yellow-orange to brownish color, waxy to dull luster. Microcrystalline structure, conchoidal fracture.

Forms from silica-rich fluids precipitating in cavities or cracks within rocks over geological time scales.

Used in lapidary arts, jewelry, and as decorative stones or collector's items.

Jasper is an opaque variety of chalcedony. The yellow-orange color is typically due to iron oxide impurities.

Identified by its hardness, conchoidal fracture, and opacity. Commonly found in riverbeds or beaches where water has smoothed it.

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)

Anthracite Coal

Anthracite (Carbon-based sedimentary-metamorphic rock)

Metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly with chalcopyrite and quartz/host rock

River Cobble (Quartzite / Sandstone Gravel)

SiO2 (Quartz-rich sedimentary/metamorphic rock)

River Pebble (Quartzite / Sandstone)

SiO2 (Quartz-rich sedimentary/metamorphic rock)

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)