Orange Quartz / Peach Aventurine
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Anthropogenic)
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Satin Spar (Gypsum)
Gypsum (Satin Spar variety) - CaSO4·2H2O
mineral
Magnetite / Lodestone
Magnetite (Fe3O4)
mineral
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Yellow Calcite / Banded Onyx Calcite
Calcite (CaCO3)
mineral
Rough Quartz (Milky / Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Chert (Jasper / Iron-stained Chert)
Microcrystalline Quartz (SiO2 with Fe-oxides)
sedimentary
Magnetite / Hematite mix
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Fossilized Shark Tooth (Partial) or Coprolite
Elasmobranchii (fossil) or Coprolite (trace fossil)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Magnetite or Hematite Nodule
Iron Oxide (Fe3O4 or Fe2O3)
mineral
Grey Banded Agate
Silicon Dioxide (SiO2)
sedimentary
Limonite (Ironstone)
FeO(OH)·nH2O
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Pebble Gravel Mix (Quartzite, Basalt, Chert)
Alluvial River Gravel / Aggregate Clasts
sedimentary
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Massive White Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Carnelian Agate Beads
Silicon Dioxide (SiO2)
gemstone
Cinnabar on Matrix with Quartz
Mercury(II) sulfide (HgS) on Quartz (SiO2) and Basalt/Siltstone matrix
mineral
Banded Calcite (often sold as "Peaches and Cream" or "Orange Calcite")
Calcium Carbonate (CaCO3)
mineral
Gastropod Fossil
Phylum Mollusca, Class Gastropoda
fossil
Blue Chalcedony
Silicon Dioxide (SiO2)
gemstone
Geode (Chert/Quartz)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Carnelian)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Mineral and Rock Collection (Assorted)
Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral