Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Category
Anthropogenic (Man Made Material Processed By Nature)
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Limestone
Calcium Carbonate (CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Mixed tumbled gemstone collection
Varied minerals, likely including amethyst, sodalite/lapis lazuli, quartzite or aventurine, jasper, and agate/chalcedony
gemstone
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O
igneous
Iron-stained chert or jasper pebble
Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing
sedimentary
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Chalk (Sedimentary Pebble)
Calcium Carbonate (CaCO3) - Biogenic Limestone
sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Hematitic Sandstone
Sandstone with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Porphyritic Basalt
Basalt (SiO2 percentage 45-52%) with phenocrysts
igneous
Diamond (or Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Green aventurine beads
Quartz (SiO₂), typically green quartzite/aventurine with fuchsite mica inclusions
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Tumbled agate or chalcedony
Microcrystalline quartz (SiO₂), likely brown/orange chalcedony or agate
mineral
White quartzite pebble
Quartzite, composed predominantly of quartz (SiO₂)
metamorphic
Quartzite
Metamorphic Quartz Arenite
metamorphic
Brown Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Dyed Agate Geode Slice
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary
Fossil Coral
Scleractinia / Rugosa (Silicified Coral)
fossil
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a geode structure
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fossiliferous Limestone
Fossiliferous Calcilutite / Biomicrite
sedimentary
Sodalite
Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2
Mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
River Rock
Polished Siliceous Rock / Quartzite Pebble
sedimentary
River Pebble / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Limestone (specifically Crushed Limestone/Calcictic)
Calcium Carbonate (CaCO3)
sedimentary
Quartz Geode/Druzy Quartz
Quartz (SiO₂)
Mineral