Banded Agate
Chalcedony (SiO2 with impurities)
mineral
Category
Mineral (Specifically, A Variety Of The Mineral Species Pyrope Almandine Garnet)
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
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Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Felsic Igneous Rock
igneous
Dragon Blood Jasper
Epidote with Red Jasper (Quartz variety)
sedimentary
Banded Agate
Agate (chalcedony variety of Silicon Dioxide, SiO2)
mineral
Green Sandstone (Glauconitic Sandstone)
Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Flint
Microcrystalline Quartz (SiO2)
sedimentary
Polished orbicular jasper (likely ocean jasper)
Jasper, a microcrystalline quartz variety; mainly SiO₂ with iron-oxide and other mineral inclusions
mineral
Sunstone with Black Tourmaline (Arfvedsonite)
Feldspar (Na,Ca)(Al,Si)4O8 with Schorl Na(Fe3+)3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Granite (specifically the Ubatuba variety)
Phaneritic Igneous Rock (Granodiorite/Monzogranite)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Raw black tourmaline (probable schorl)
Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Moonstone
Orthoclase Feldspar (specifically showing adularescence)
Mineral
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Citrine Quartz
Macrocrystalline Quartz (SiO2)
mineral
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Staurolite
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
mineral
Black tourmaline bead bracelet (likely schorl)
Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Banded Agate (specifically Carnelian Agate color)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Selenite
Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite
Mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Sardonyx Cameo
Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz
Mineral
Polished brecciated jasper
Brecciated jasper (microcrystalline quartz, SiO₂), likely iron-stained chalcedony matrix
metamorphic
Tumbled cream-colored pebble, likely quartz or calcite
Indeterminate from photograph; possibilities include microcrystalline quartz (SiO₂) or calcite (CaCO₃)
mineral
Dendritic Agate or Moss Agate Nodules (Septarian-like)
Chalcedony with mineral inclusions (SiO2)
sedimentary
Polished honey/pink calcite heart
Calcite, calcium carbonate (CaCO₃)
mineral
Polished jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
mineral
Orbicular jasper (likely ocean jasper)
Silica-rich microcrystalline quartz/chalcedony with iron-oxide and other mineral inclusions; SiO₂
mineral
Sandstone Concretion
Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)
sedimentary
Granite
Plutonic felsic igneous rock
igneous
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Quartz-rich pegmatite fragment
Granite-family pegmatite; chiefly quartz (SiO₂), feldspar, and black mica (biotite)
igneous
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Ruby / Red Tourmaline
Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
mineral
Polished brecciated jasper pebble
Silicified microcrystalline quartz (SiO₂), commonly iron-oxide-stained jasper
gemstone