Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony
Quartz (SiO₂), potentially microcrystalline quartz (chalcedony)
Category
Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.
Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony
Quartz (SiO₂), potentially microcrystalline quartz (chalcedony)
Quartz-veined Sedimentary Rock
Sedimentary rock with hydrothermal quartz veins
Tumbled Carnelian
Silicon Dioxide (Variety of Chalcedony), SiO2
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (Quartz variety, SiO2)
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Orange Calcite
Calcium Carbonate (CaCO3)
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
Tumbled yellow calcite
Calcite (CaCO₃), likely honey/yellow calcite
Pyrite Concretion
Iron Sulfide (FeS2) in Sedimentary Matrix
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
White Agate / Chalcedony
Silicon Dioxide (SiO2)
Milky Quartz Geode / Chalcedony Nodule
Quartz (Silicon Dioxide - SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
Celestine (Celestite)
Strontium sulfate (SrSO4)
Orange Calcite (with White Calcite/Quartz matrix)
Calcium Carbonate (CaCO3)
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite
Jasper (Green)
Silicon dioxide (SiO2)
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Hematite
Iron(III) oxide (Fe2O3)
Geode (unopened)
Calcedony-lined Geode (SiO2)
Agate (or Chalcedony)
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Red Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
Chert/Flint Nodule
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
Iron-stained Quartz
Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geode
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in sedimentary/volcanic host
Orbicular Jasper
Silicon Dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)