Serpentine / Serpentinite
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Category
Non Geological
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Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Amber
Succinite (organic gemstone, approx. C10H16O)
fossil
Quartzite
Quartzite (Mainly SiO2)
metamorphic
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
metamorphic
Quartzite Cobble (Iron-stained)
Quartzite (SiO2)
metamorphic
Pumice
Pumice (Vesicular Volcanic Glass)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Rounded granite pebble
Granite, chiefly quartz, feldspar, and mica; approximate composition SiO₂-rich felsic rock
igneous
Dark river pebble (likely basalt or andesite)
Fine-grained mafic/intermediate volcanic rock; commonly basalt (plagioclase ± pyroxene/olivine)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Baryte (Barite)
Barium sulfate (BaSO4)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Shungite
Non-crystalline carbon (similar to anthracite coal or meta-anthracite)
metamorphic
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Uncertain small metallic-looking mineral/rock fragment
Indeterminate; possibly galena-bearing rock or metallic slag
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Opalite (Synthetic Moonstone/Opal)
Synthetic Silica Glass
mineraloid (synthetic)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Sea Glass
Amorphous Silica (Anthropogenic glass) - SiO2
mineral
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Banded chert or flint pebble
Microcrystalline quartz (SiO₂), likely chert with a pale weathered/altered zone
sedimentary
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Barite
Barium Sulfate (BaSO4)
mineral
Conglomerate
Conglomerative Sedimentary Rock
sedimentary