Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Category
Mineral, Specifically An Iron Ore
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
Amber
Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)
sedimentary
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Mineraloid / Synthetic Glass
Gneiss (specifically a Granitic Gneiss)
Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Biotite Mica
K(Mg,Fe)3AlSi3O10(OH)2
Mineral in a matrix (likely quartz or feldspar)
Serpentine (Serpentinite)
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Basalt
Basalt (composition: Plagioclase, Pyroxene, and Olivine)
igneous
Banded Agate (Onyx type)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chalcedony (specifically Agate or Flint)
Silicon Dioxide (SiO₂)
Mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Granite (specifically Brown Granite Countertop)
Phaneritic Felsic Igneous Rock (Granite-Gabbro series)
igneous
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Obsidian (Apache Tear)
Volcanic Glass (SiO2)
igneous
Pink Granite
Granite (Phaneritic intrusive igneous rock dominated by Quartz and K-Feldspar)
igneous
Unakite
Unakite (Epidotized Granite)
metamorphic
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Chert (specifically Tan Chert)
Chert (SiO2)
sedimentary
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2)
Sedimentary Rock
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Moonstone
Adularia (orthoclase feldspar variety)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Epidosite (Epidote-rich rock)
Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))
metamorphic
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert Nodule in Limestone)
Microcrystalline Quartz (SiO2)
sedimentary