Demitasse Granite (Diorite-Granite transition)
Intermediate Plutonic Rock (Granodiorite/Diorite mix)
igneous
Category
Synthetic (Not A Rock Or Mineral)
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Granite
Phaneritic Felsic Igneous Rock
igneous
Dalmation Stone
Peralkaline Rock (SiO2 with Arfvedsonite)
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Fuchsite
Chromium-rich Muscovite Mica
mineral
Agate (or Chalcedony with Moss/Jasper Inclusions)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
sedimentary
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
River Rock
Siliciclastic rock (water-worn pebble)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked)
Crystalline Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Rounded gray metamorphic cobble, likely quartzite or gneiss
Quartz-rich metamorphic rock; possibly quartzite (mostly SiO₂) or banded gneiss
metamorphic
Granite
Phaneritic Igneous Rock (Granite)
igneous
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Terrigenous Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
sedimentary
Sandstone (with Quartz veining)
Arenite (primarily SiO2)
sedimentary
Jasper (Yellow Jasper)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Pink Granite (Unakite-bearing or Epidote-bearing Granite)
Plutonic Igneous Rock (Granite)
igneous
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Moonstone
Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone
Dalmatian Stone (formerly called Dalmatian Jasper)
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Basalt River Stone with Quartz Vein
Basalt (Mafic volcanic rock)
igneous
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Painted Sandstone Cobble
Clastic Sedimentary Rock (Sandstone base)
sedimentary