Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Raw Diamond
Diamond (C)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Limestone
Calcium carbonate ( преимущественно CaCO3)
sedimentary
Chert (Field Stone)
Chert (SiO2)
sedimentary
Pegmatite
Granitic Pegmatite
igneous
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)
mineral
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO₂)
Mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8) with Trace Elements
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Yellow Jasper variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Siltstone
Siltstone (primarily SiO2 with Al2O3 and Fe2O3)
sedimentary
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Basalt
Mafic volcanic rock (various silicate minerals including Pyroxene and Plagioclase)
igneous
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Garnet (almandine or pyrope variety)
Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Pegmatite
Granitic Pegmatite
igneous
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Schist
Mica Schist
metamorphic
Slate
Slate (Metamorphic Rock)
metamorphic
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Ferruginous Sandstone with Quartz Inclusions
Clastic Sedimentary Rock (Iron-rich Sandstone)
sedimentary
Chert (Nodule)
SiO2 (Microcrystalline Quartz)
sedimentary
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sedimentary Rock
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
mineral
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Bornite
Bornite (Cu5FeS4)
mineral
Sunstone
Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral