Amber with Inclusion
Succiniferous fossil resin (C10H16O)
mineraloid
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene
igneous
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Dendritic Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
metamorphic
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Rhodolite Garnet
Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3
mineral
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Chert (White Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (variously known as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Yellow or Tan Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Shale
Fissile Mudstone (Shale)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Obsidian
Volcanic Glass (70-75% SiO2 with MgO and Fe3O4)
igneous
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Amber
Amber (Amorphous Organic Hydrocarbon)
mineral
Amber
Succinite (a fossilized organic resin)
mineral
Chert (and Flint variant)
Chert (SiO2)
sedimentary
Tiger's Eye (Polished Point/Tower)
SiO2 (Silicon Dioxide) with included crocidolite fibers
Mineral (Metamorphic pseudomorph)