Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Technogenic) in the encyclopedia
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Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Basalt with Epidote/Chlorite
Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))
igneous
Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Mantle Xenolith in Basalt
Peridotite Xenolith in Basalt
igneous
White Quartz with Black Tourmaline
Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Geodic cavity
sedimentary
Fossil Coral
Rugosa or Tabulata coral fossil (Calcite/Silica replacement)
fossil
Glauconitic Sandstone
Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2
sedimentary
Quartz with Chlorite or Hornblende inclusions
Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions
metamorphic
Garden Quartz
Silicon Dioxide (SiO2) with various inclusions (Lodolite)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Fossilized Coral
Rugose Coral / Hexagonaria (Fossilized calcium carbonate)
fossil
Septarian Nodule
Septarian Nodule (Calcite, Aragonite, and Limestone/Claystone)
sedimentary
Milky Quartz with Tourmaline and Iron Oxides
Silicon Dioxide (SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt with Secondary Mineral Amygdules
igneous
Vanadinite on Barite
Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Limonite Concretion
Limonite (Hydrated iron oxide) FeO(OH)·nH2O
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Yellow Apatite Sphere (Polished)
Fluorapatite / Ca5(PO4)3F
mineral
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Pink Calcite
Calcium Carbonate (CaCO3)
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral