Dyed Purple Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Category
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Chert
Chert (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Common Opal or Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
metamorphic
Green Jade (specifically Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Carnelian Agate
Silicon Dioxide with Iron Oxide impurities (SiO2)
mineral
Fluorite (Green Fluorite on Host Rock)
Fluorite (Calcium Fluoride, CaF2)
mineral
Porphyritic Basalt (likely artificially dyed or altered)
Basalt with plagioclase phenocrysts (likely treated)
igneous
Quartz (Clear / Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides
mineral
Chert with Calcite Veining
Microcrystalline Quartz (SiO2) with Calcium Carbonate (CaCO3) veins
sedimentary
Coquina
Bioclastic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Amethyst Quartz Druse
Silicon Dioxide (SiO2) with iron impurities
mineral
Pink Granite (Alkali Feldspar Granite)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8
igneous
Pyritic Sandstone
Clastic Sedimentary Rock (Pyrite-bearing Sandstone)
sedimentary
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral
Chert (Jasper/Agate variant)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Pumice
Pumice (Highly vesicular volcanic glass)
igneous
Hematite
Ferric oxide (Fe2O3)
mineral
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Banded Agate (Quartz)
Agate (Silicon Dioxide, SiO2)
sedimentary
Greenstone / Greenschist
Greenschist (metamorphosed mafic rock)
metamorphic
Laterite
Laterite (Ferricrete)
sedimentary
Quartz Pebble (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite mica (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Golden Mica Schist
Mica Schist (primarily Muscovite/Biotite with Quartz)
metamorphic