Blue Lace Agate Geode Nodules
Chalcedony (cryptocrystalline Quartz, SiO2)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Dragon Egg Agate
Agate (Silicon Dioxide, SiO2)
sedimentary
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineralological variety
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral
Red Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
sedimentary
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (River Cobble)
Quartzite (Metamorphosed Quartz Sandstone, SiO2)
metamorphic
Banded Agate (specifically Lace Agate type)
Silicon Dioxide (SiO2)
mineral
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Gneiss (likely Granitic Gneiss)
Gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Bi-Color Tourmaline (or Watermelon Tourmaline)
Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)
Mineral
Labradorite
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
mineral
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Gneiss
Gneiss (Metamorphic rock predominantly containing quartz, feldspar, and mica)
metamorphic
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Greenstone
Epidiorite / Altered Basalt
metamorphic
Raw Sunstone
Plagioclase Feldspar (Na, Ca)(Al, Si)4O8
mineral
Greenstone (Metabalt)
Chlorite schist / Altered Basalt
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Greenstone (Epidote/Chlorite Schist)
Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
metamorphic
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Amethyst (Hematoid Quartz)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Greenstone / Greenstone Pebble
Greenschist (metamorphosed basalt or gabbro)
metamorphic
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
mineral
Banded Gneiss
Foliated Gneiss
metamorphic
Yellow Quartz (Citrine/Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Yellow Quartz (Citrine or Citrine-colored Quartz)
Silicon Dioxide (SiO2)
mineral