Quartz Veined Basalt Pebble
Amygdaloidal Basalt with Quartz (SiO2) veining
igneous
Category
Sedimentary (Secondary Classification: Cryptocrystalline Quartz)
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
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Sandstone (Quartzite texture)
Arenite (SiO2 secondary)
sedimentary
Greenstone (Amygdaloidal Basalt)
Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)
igneous
Gold Nugget
Native Gold (Au)
mineral
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock (Hydrothermal Veined)
igneous
Gold Nugget
Native Gold (Au)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Banded Jasper (Chert)
Silicon Dioxide (SiO2) - variety of Chalcedony
Sedimentary Rock
Yellow Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
sedimentary
Chrysocolla
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)
SiO₂ (silicon dioxide)
Sedimentary
Porous Quartzite
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Leopardskin Jasper
Jasper (a variety of microcrystalline Quartz)
Sedimentary
Quartz Druzy on Matrix (with Copper Mineralization)
Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)
mineral
Chrysocolla
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O
mineral
Honey Calcite (Orange Onyx)
Calcium Carbonate (CaCO3)
mineral
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Mineral
Banded Agate (specifically Carnelian Agate color)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (faceted in jewelry)
Corundum (Al2O3)
mineral
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Chert (containing Quartz/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Rose or Milky variety fragment)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Jasper Breccia
Silicon Dioxide (SiO2) with impurities
sedimentary
Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Chrysocolla
Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Basalt
Basalt (Aphanitic mafic volcanic rock)
igneous
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Limonite (Yellow Ochre)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Quartzite (Ferruginous)
Metamorphosed Quartz Sandstone (SiO2 with Iron oxide staining)
metamorphic
Agate (or Chalcedony)
SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz
Mineral