Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Category
Igneous Or Sedimentary
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Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Crushed Stone (Likely Granite or Diabase)
Intrusive Igneous Rock (Granitoid/Gabbroid)
igneous
Granite Water-Worn Pebble
Intermediate to Felsic Phaneritic Igneous Rock
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Basalt Pebble
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt (River Stone)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Diorite
Diorite (an intermediate intrusive igneous rock)
igneous
Granodiorite Pebble
Granodiorite (Intermediate intrusive igneous rock)
igneous
Diorite
Phaneritic intermediate intrusive igneous rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
sedimentary
Limonite (Ironstone Concretion)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Milky Quartz (Water-worn pebble/nodule)
Quartz (Silicon Dioxide - SiO2)
mineral
Peridot (Olivine)
Olivine (Magnesium Iron Silicate), (Mg,Fe)2SiO4
mineral
Arsenopyrite in Quartz/Host Rock
Arsenopyrite (FeAsS)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Pegmatite (Granitic) with Tourmaline
Granitic Pegmatite (containing Schorl and Quartz)
igneous
Eudialyte with Syenite
Eudialyte: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
gemstone
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Mixed Mineral Collection (with Titanium Aura Quartz)
Silicon Dioxide (SiO2) with metallic coatings and various silicates
mineral
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Labradorite
Labradorite (Ca, Na)(Al, Si)4O8
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral