Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Mineral
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Bloodstone
Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)
sedimentary
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Jasper
Silicon Dioxide (SiO2)
sedimentary
Dalmatian Stone
Dalmatian Jasper / Feldspathic Igneous Rock
igneous
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Agate (or Banded Agate)
Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)
Mineral, specifically a Cryptocrystalline Quartz variety
Chert / River Pebble
Silicon Dioxide (SiO2)
sedimentary
Zebra Jasper
Silicon dioxide (SiO2) with various impurities
Sedimentary
Banded Iron Formation (BIF) / Iron Ore
Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)
sedimentary
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
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Unakite
Epidotized Granite
metamorphic
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Shale
Lutaceous Sedimentary Rock
sedimentary
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Basalt
Extrusive mafic igneous rock
igneous
Banded Sandstone
Arenite (with iron oxide banding)
sedimentary
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Limonite (Ironstone)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Caliche (also known as hardpan, calcrete, kankar)
Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.
Mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Diamond
Carbon (C)
mineral
Diamond
Diamond (C)
mineral
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Calcite
Calcite (CaCO3)
Mineral
Limonite/Goethite Gossan
FeO(OH)·nH2O (Hydrated iron oxide)
mineral
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary