Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)
metamorphic
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
Granite
Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Unakite
Epidote-Feldspar rock (specifically, a variety of granite)
Metamorphic rock
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limestone with Quartz/Calcite Veins
Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
metamorphic
Copper-bearing Quartz (likely Chrysocolla or Malachite staining)
Cuprite, Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) or Malachite staining on Quartz/Host Rock
mineral
Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (primarily Quartz SiO₂ with Hematite Fe₂O₃ staining)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Basalt with Epidote Veining
Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)
igneous
Amethyst Geode/Cluster
Quartz (SiO2) - variety Amethyst
Mineral
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
sedimentary
Ruby
Corundum (Al2O3 with Chromium)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, Pyrite, and Calcite)
metamorphic
Massive Quartz
Silicon dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Shale (possibly Carbonaceous or Oil Shale)
Laminated Mudstone (primarily clay minerals and quartz)
sedimentary
Sandstone
Arenite
sedimentary
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
sedimentary
Jasper and Quartzite mix
Silicon Dioxide (SiO2) with impurities
sedimentary or metamorphic
Red Sandstone
Arenite
sedimentary
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Halite
Halite (Sodium Chloride, NaCl)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sapphire
Corundum (Al2O3)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
metamorphic
Basalt (with possible Olivine inclusions)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous