Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Mineral Composite
Browse mineral composite specimens identified by the Rock Identifier community.
Learn about Mineral Composite in the encyclopedia
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Orthoclase Feldspar (Salmon variety)
Orthoclase, KAlSi3O8
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz with Limonite Staining
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
Mineral
Quartz Pebble (Sea Glass-like Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chrysotile Asbestos
Mg3Si2O5(OH)4
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Banded sandstone pebble
Quartz-rich sandstone, likely with a contrasting siltstone or fine-grained sandstone band
sedimentary
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Amazonite
Microcline (KAlSi3O8)
mineral
Red Sandstone
Arenite (Fe2O3-rich)
sedimentary
Greenstone / Greenschist
Chlorite schist / Epidiorite
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Picture Jasper
SiO2 (Microcrystalline Quartz / Chalcedony with iron oxide impurities)
sedimentary
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Quartz Geode Fragment
Silicon dioxide (SiO2) within a nodule
sedimentary
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sapphire (Raw/Rough)
Corundum (Al2O3)
mineral
Vesicular basalt (likely amygdaloidal basalt)
Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.
igneous
Sandstone (Quartz Sandstone / Iron-stained Sandstone)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
sedimentary
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper
SiO2
mineral
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Chrysocolla (with Malachite / Secondary Copper Minerals)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Copper Ore with Chalcocite
Copper sulfide (Cu2S) with associated copper-bearing minerals
mineral