Granite
Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)
igneous
Category
Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)
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Granite
Granite
igneous
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Orthoclase)
igneous
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous
Marble
Metamorphic carbonate rock (primarily CaCO3)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Blue cabochon gemstone ring
Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel
gemstone
Green Tiger's Eye
Silicified Crocidolite (Quartz variety, SiO2)
metamorphic
Agate (specifically Botswana or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Granite
Phaneritic intrusive igneous rock
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt Pebble
Extrusive Igneous Rock
igneous
Dark fine-grained igneous rock, likely basalt
Basalt; commonly composed of plagioclase feldspar, pyroxene, and minor olivine or magnetite
igneous
Basalt Pebble
Extrusive igneous rock
igneous
Granite
Plutonic Igneous Rock (Granite)
igneous
Basalt Pebble
Extrusive mafic igneous rock
igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Polished serpentine
Serpentine-group minerals, chiefly lizardite and/or antigorite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Quartzite with Calcite Accretion
Metamorphosed Quartz Sandstone (SiO2 with CaCO3 coating)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Black Granite (Basalt or Gabbro)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Porphyritic Andesite or Basalt
Porphyritic Intermediate/Mafic Igneous Rock
igneous
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Pink Granite (Alkali Feldspar Granite)
Granite (rich in Potassium Feldspar / Orthoclase)
igneous
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Quartzite with Iron Inclusions
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic extrusive igneous rock
igneous
Granite (Pink/Alkali Feldspar Granite)
Plutonic Igneous Rock (Granite)
igneous
Porphyritic Basalt
Basalt (Extrusive Igneous Rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Granite
Granite (Phaneritic Quartz-Feldspar Intrusive)
igneous
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous