Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Jasper in Basalt Matrix
Silicon Dioxide (SiO2) with impurities; Chalcedony
sedimentary (secondary mineral) within igneous
Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')
Calcium Carbonate (CaCO3)
sedimentary
Sandstone Concretion
Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)
sedimentary
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
igneous
Bog Iron (Limonite Concretion)
Limonite (FeO(OH)·nH2O)
sedimentary
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Chert (often called Flint when dark or found in chalk)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Marcasite Concretion (Propeller/Sand Dollar shape)
Marcasite (FeS2)
mineral
Turquoise or Chrysocolla (Inlaid Jewelry)
Hydrated copper aluminum phosphate / Hydrated copper phyllosilicate
mineral
Basalt (tumbled/river-worn)
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Gray Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Chip
Silicon Dioxide (SiO2)
mineral
Chert
Chert (SiO2)
sedimentary
Pyromorphite
Pyromorphite (Pb5(PO4)3Cl)
mineral
Vesicular Basalt
Vesicular Basalt (rich in silicate minerals mostly Plagioclase and Pyroxene)
igneous
Calcite
Calcium Carbonate (CaCO3)
mineral
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Hematite/Goethite shell with Sandstone core)
sedimentary
Orbicular Jasper (Ocean Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossilized Blastoid
Pentremites (Class Blastoidea)
sedimentary
Bauxite / Iron-rich Laterite
Laterite (principally Al(OH)3, Fe2O3, and SiO2)
sedimentary
Dragon Stone
Argillaceous Sedimentary Rock (Ohko Stone)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gold Flakes
Native Gold (Au)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone (Greywacke)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Chert Nodules / Flint
Crystalline Silica (SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone Beach Pebble
Clastic Sandstone (SiO2 - Quartz-dominant)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Favosites Fossil (Honeycomb Coral)
Favosites (Extinct genus of Tabulate Coral)
sedimentary
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)
sedimentary
Chert (Field Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically a flint nodule component)
Microcrystalline quartz (SiO2)
sedimentary