Basalt
Extrusive igneous rock
igneous
Category
Igneous Or Mineral
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Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite (composed primarily of Quartz, Potassium Feldspar, Plagioclase Feldspar, and Biotite/Mica)
igneous
Weathered granite or granitic gneiss
Granite/granitic gneiss, composed mainly of quartz, feldspar, and mica
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Yellow Aventurine
Quartz (Silicon Dioxide) with Mica inclusions (SiO2)
mineral
White Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Zircon
Zircon (Zirconium Silicate), ZrSiO4
gemstone
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Basalt
Mafic Igneous Rock
igneous
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Granite Boulder
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Gabbro (Water-worn Pebble)
Gabbro
igneous
Biotite granite (weathered granitic rock)
Granite, chiefly quartz–feldspar–biotite; approximate composition SiO₂-rich, with K-feldspar and plagioclase
igneous
Clear Quartz
Silicon dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Botryoidal Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
K2 Azurite Granite / K2 Stone
Granite (igneous rock) with Azurite inclusions (mineral)
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz
Silicon dioxide (SiO2)
mineral
Quartz Pebbles
Silicon Dioxide (SiO2)
mineral
Kfeldspar (Potassium Feldspar)
KAlSi3O8
mineral
Quartz-rich pegmatite fragment
Granite-family pegmatite; chiefly quartz (SiO₂), feldspar, and black mica (biotite)
igneous
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Granite
Intrusive igneous felsic rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz/Citrine Type)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral