Granite
Granite
Igneous
Category
Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic
Jade
There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.
Mineral
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
igneous
Dark Igneous Rock (Likely Basalt or Diabase)
Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.
Igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Ruby Fuchsite / Ruby in Fuchsite
Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix
Mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Moss Agate
Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)
mineral
Schist
Mica Schist
metamorphic
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Pink Quartz (Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Lapis Lazuli
Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Unakite
Epidotized Granite
metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite in Matrix (likely Quartz or Coal)
Iron Sulfide (FeS2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Tumbled/River Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Prehnite
Prehnite Ca2Al2Si3O10(OH)2
mineral
Jade (likely Nephrite Jade based on appearance)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Basalt-Amugydule (Amygdaloidal Basalt)
Aphanitic Mafic Igneous Rock with Vesicle Infillings
igneous
Sandstone
Arenite (SiO2 based)
sedimentary