Rhodolite Garnet
Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3
mineral
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
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Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8
mineral
![Quartz with Muscovite Mica (Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]) — mineral](https://media.rock.id/0c7649cd-4e3b-497f-9306-feae39b499ce-thumbnail.jpg)
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Amber
Succinite (fossilized organic resin)
mineral
Amber
Succinite (Organic Mineraloid) - C10H16O
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Human Skin (Epidermis/Dermis)
Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)
Mineral-like biological tissue
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
sedimentary
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
mineral
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Amber
Succinurite (C10H16O)
mineraloid
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Obsidian
Volcanic Glass (70-75% SiO2 with MgO and Fe3O4)
igneous
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Shungite
Shungite (Non-crystalline carbon, C)
mineral
Chert with Quartz Druzy
Microcrystalline Quartz (SiO2) with Drusy Quartz Coating
sedimentary
Jasper (Multi-color Chert)
Silicon Dioxide (SiO2) with impurities
sedimentary
Quartz (Milky or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
sedimentary