Aventurine
Aventurine Quartz (SiO2 with inclusions)
Category
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (and Limestone Pebbles)
Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Chert (often called Flint when dark)
Sedimentary cryptocrystalline quartz (SiO2)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Septarian Nodule Segment (Turtle Stone)
Septarian Concretion (CaCO3 with Siderite or Calcite infill)
Quartz-veined Siltstone/Greywacke
Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)
Yellow Jasper
Silicon Dioxide (SiO2)
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
Moqui Marble
Iron Oxide Concretion (Limonite/Hematite over Sandstone)
Septarian Nodule Segment (Commonly known as Dragon Stone or Lightning Stone)
Septarian Nodule (CaCO3 / Hydrated Calcium Carbonate)
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Fluorite
Calcium Fluoride (CaF2)
Orange Calcite (likely polished specimen)
Calcite
Serpentinite
Serpentinite
Chert (Yellow/Tan Variety)
Chert (SiO2)
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
Limestone (Brecciated/Recrystallized)
Calcium Carbonate (CaCO3)
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Chert (Flint nodule)
Silicon Dioxide (SiO2)
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert (and Chalcedony)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
Serpentinite
Serpentinite (Mg, Fe, Ni)₃Si₂O―(OH)₄
Quartz Druze (on Matrix)
Silicon Dioxide (SiO2)
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Blue Calcite
Calcium Carbonate (CaCO3)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Quartz
Quartz (SiO2 - Silicon Dioxide)
Magnetite
Magnetite (Fe3O4)
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
Limestone
Calcium Carbonate (CaCO3)
Botryoidal Chalcedony (Desert Rose / Agate)
Silicon Dioxide (SiO₂)
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)