Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
sedimentary
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
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Limonite after Pyrite (Prophecy Stone)
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Mineral pseudomorph
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Red Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Rough Quartz in Pegmatite Matrix
Quartz (Silicon Dioxide - SiO2) in Granitic Pegmatite
igneous
Fossilized Angel Wing Shell
Cyrtopleura costata
sedimentary
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Geode (CaCO3 + Mg + Fe)
sedimentary
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Quartz crystal with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Carnelian
SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony
mineral
Mookaite Jasper
Silicified Radiolarite (Silicon Dioxide: SiO2)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Sandstone (specifically Arkose or Siltstone variant)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Plagioclase Feldspar (specifically Albite/Oligoclase)
(Na,Ca)(Si,Al)4O8
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Moonstone (specifically White Moonstone/Adularia)
Potassium aluminum silicate ((K,Na)AlSi3O8)
mineral
Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Chalcedony (specifically Agate or Carnelian)
Silicon Dioxide (SiO2)
mineral
Chalcedony (specifically Agate or Water-worn Quartzite)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Milky or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Chert Nodule (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Labradorite (Feldspar)
Labradorite: (Ca,Na)(Al,Si)4O8
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Green Aventurine
Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide - SiO2)
mineral
Blue Chalcedony (Blue Lace Agate variety)
Silicon Dioxide (SiO₂)
mineral
Banded Agate (specifically shades of Carnelian Agate)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
mineral