Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
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Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite/Magnetite inclusions)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Basalt with Weathered Crust
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Chlorite (Small Flakes/Sand)
Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
mineral
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Geode (Unopened)
Chalcedony/Quartz Geode (SiO2)
sedimentary
Blue Dumortierite Quartz
Dumortierite Inclusions in Quartz (SiO2 with Al7(BO3)(SiO4)3O3)
mineral
Gabbro or Diorite with Quartz/Epidote Vein
Intrusive Igneous Rock (Plutonic)
igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Moss Agate with Jasper
Chalcedony (SiO2 with inclusions)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Veins
Basalt (complex silicate) with Quartz (SiO2) intrusions
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (or Scoria)
Mafic extrusive igneous rock with vesicles
igneous
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
Gabbro (Indigo Gabbro)
Gabbro (mafic intrusive igneous rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Diorite
Intrusive Igneous Rock (Intermediate Composition)
igneous
Komatiite Drill Core
Ultramafic Volcanic Rock (Spinifex Texture)
igneous
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Quartz
Quartz (SiO₂)
Mineral
Vesicular Basalt with Mineral Inclusions
Vesicular Basalt
igneous
Black Obsidian
Volcanic Glass (Amorphous SiO2 with trace impurities)
igneous
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Granite
Granite (High-silica plutonic rock)
igneous
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Granite Pegmatite
Coarse-grained Granite (SiO2 - Aluminum and Alkalies)
igneous
Pumice
Pumicite
igneous
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous