Rough Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Carved Stone
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Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Hag Stone
Perforated Calcarenite or Chert
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Flint / Chert
Silicon Dioxide (SiO2)
sedimentary
Granodiorite
Granodiorite
igneous
Quartz-Veined Basalt River Stone
Basalt with milky quartz (SiO2) vein
igneous
Fossilized Dinosaur Bone
Perineralized Bone (Fluorapatite/Quartz replacement)
fossil
Mixed polished river stones
Likely quartz, quartzite, chert/jasper, and possibly limestone or marble
mineral
Limestone
Calcium Carbonate (CaCO3) / Limestone
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Citrine
Silicon Dioxide (SiO2)
gemstone
Citrine
SiO2 (Silicon Dioxide)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Larimar (Pectolite)
NaCa2Si3O8(OH)
mineral
Amazonite
Tectosilicate (variety of Microcline), K(AlSi3O8)
mineral
Dalmatian Jasper (Dalmatian Stone)
Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)
igneous
Tumbled brown jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Kidney Stone (Medical Specimen)
Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O
Mineral (Biogenic)
Jasper (Cream/Yellow variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Rounded greenstone pebble
Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Hag Stone (Holed Quartzite Pebble)
Quartzite (SiO2 based) with natural vug or erosion hole
sedimentary/metamorphic
Porphyritic Basalt (Chinese Writing Stone/Flower Stone)
Porphyritic Basalt (primarily Plagioclase Feldspar in a Mafic groundmass)
igneous
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone or Weathered Conglomerate
Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)
sedimentary
Rhyolite
Rhyolite (felsic extrusive igneous rock)
igneous
Gneiss
Gneiss
metamorphic
Granite
Intrusive igneous rock
igneous
Granodiorite
Phaneritic Intrusive Igneous Rock
igneous
Red Sandstone
Quartzose Sandstone (SiO2)
sedimentary
Gneiss
Metamorphic Foliated Gneiss
metamorphic
Sandstone
Sandstone (Quartz-rich sedimentary rock)
sedimentary