Blue Kyanite
Kyanite (Al2SiO5)
mineral
Category
Man Made Material
Browse man made material specimens identified by the Rock Identifier community.
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material
Jasper and Aquamarine (likely)
Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))
Sedimentary (Jasper), Mineral (Aquamarine)
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Dendritic Agate (or Dendritic Opal)
SiO2 (for Agate), SiO2·nH2O (for Opal)
Mineral
Granite
Felsic Intrusive Igneous Rock
igneous
Granite
Granite (a common term for a felsic intrusive igneous rock)
igneous
Diamond
Diamond (C)
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Limestone
CaCO3 (Mainly Calcite or Aragonite)
sedimentary
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
sedimentary
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
not a rock (synthetic material)
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Mineral, specifically a detrital grain
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Pink Granite (Fragment)
Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)
Igneous
Milky Quartz
Silicon dioxide (SiO2)
mineral
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
metamorphic
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
sedimentary
Diamond (Rough)
Diamond (C)
Mineral
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)
Chert (microcrystalline quartz)
Metamorphic Rock
Limonite (Iron Ore)
Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)
Mineral
Diamond (Rough)
Diamond (Carbon, C)
Mineral
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral