Amber
Fossilized tree resin (C10H16O)
gemstone
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Fossilized Dinosaur Bone
Perineralized Bone (Fluorapatite/Quartz replacement)
fossil
Pumice
Pumice (Vesicular Felsic Igneous Rock)
igneous
Banded Chert
Microcrystalline quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Banded Basalt / Lave Stone or Gneiss Pebble
Igneous/Metamorphic banded pebble
igneous
Chert
Microcrystalline quartz (SiO2)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Amber
Fossilized Tree Resin
gemstone
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine
Be3Al2(Si6O18)
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Obsidian
Obsidian (volcanic glass)
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Obsidian
Obsidian
igneous
Lemon Quartz
Silicon Dioxide (SiO2)
mineral
Apache Tear (Obsidian)
Obsidian
Igneous
Ruby in Zoisite (Anyolite) or possibly a dyed stone/agate
Anyolite (Ruby in green zoisite) or artificially altered chalcedony
metamorphic
Moss Agate
Silicon Dioxide (Chalcedony with green mineral inclusions), SiO2
gemstone
Amethyst
Quartz (SiO2) - Amethyst variety
gemstone
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
mineral
Lapis Lazuli
Lapis Lazuli (Metamorphic rock primarily composed of Lazurite, Calcite, and Pyrite)
rock
Greenstone
Metabasalt / Greenschist
metamorphic
Conglomerate
Polymictic Conglomerate
sedimentary
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Quartzite
Quartzite
metamorphic
Granite
Intrusive Igneous Rock (Mainly Quartz, Feldspar, and Mica)
igneous
Turquoise in Matrix
Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O
mineral
Granite
Felsic intrusive igneous rock
igneous
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Chrysocolla in Cuprite / Mixed Copper Ore
Hydrated copper silicate and copper(I) oxide, (Cu,Al)2H2Si2O5(OH)4·nH2O and Cu2O
mineral
Granite
Felsic intrusive igneous rock
igneous
K-Feldspar Granite Fragment
Felsic Plutonic Rock (Granite)
igneous