Sedimentary And Metamorphic

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Kyanite

Kyanite (Al2SiO5)

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Small pale stone, likely quartzite or limestone fragment

Indeterminate; possible quartzite (mostly SiO₂) or calcitic limestone (CaCO₃)

Quartz pebble

Silicon dioxide (SiO2)

Raw Calcite

Calcite (Calcium Carbonate - CaCO3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Crystalline Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Garnet (Polished)

Nesosilicate (Group formula: X3Y2(SiO4)3)

Quartz

Silicon dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Pyrite

Iron Sulfide (FeS2)

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pink Feldspar

Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8