Quartzite (with mineral vein)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Category
Mineral Composite
Browse mineral composite specimens identified by the Rock Identifier community.
Learn about Mineral Composite in the encyclopedia
View all →
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Limonite Nodule
FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)
mineral
Granite / Gneiss Ballast Rock
Granite (Quartzo-feldspathic rock)
igneous
Quartz pebble
Silicon dioxide (SiO2)
mineral
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Gneiss Pebble
Gneiss
metamorphic
Fossil Shark Tooth
Odontaspididae (Sand Tiger Shark family)
fossil
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Likely weathered quartz-rich rock fragment
Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Aventurine and Clear Quartz Bracelet
Quartz variety with Fuchsite inclusions (Aventurine) and pure Silicon Dioxide (SiO2)
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Granite
Intrusive Igneous Rock
igneous
Sandstone (Pebble / Cobble)
Arenite / Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Sandstone
Arenite
sedimentary
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Limonite (Oxidized Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Schist
Mica Schist
metamorphic
Schist
Mica schist, likely muscovite–biotite schist with quartz and feldspar
metamorphic
Green Fluorite (Botryoidal/Massive)
Calcium Fluoride (CaF2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Quartz Vein / Quartz Matrix
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (Metamorphic rock predominantly containing quartz, K-feldspar, and plagioclase)
metamorphic
Schist
Mica Schist
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
man-made alloy (metallic)
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Peacock Ore (Bornite or Iridescent Chalcopyrite)
Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)
mineral