Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Category
Marble
Browse marble specimens identified by the Rock Identifier community.
Blue Apatite
Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)
mineral
Lapis Lazuli
Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodalite)
mineral
Hematite Nodules (Moqui Marbles style)
Iron Oxide (Fe2O3)
mineral
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Mineral
Graphite
Graphite (Carbon, C)
Mineral
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
sedimentary
Fossiliferous Limestone
CaCO3 (principally Calcite or Aragonite)
sedimentary
Kimberlite
Kimberlite (Potassic ultramafic volcanic rock)
igneous
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)
Metamorphic rock (for both Nephrite and Jadeite)
Kimberlite
Kimberlite (Potassic ultramafic igneous rock)
igneous
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
mineral-based alloy (anthropogenic)
Fossilized Shark Tooth
Otodus obliquus (Mackerel Shark)
sedimentary
White Coral
Corallium rubrum (biocarbonate calcium) / CaCO3
mineral
Oolitic Limestone / Fossiliferous Chert
Oolitic Limestone (CaCO3) / Silicified Limestone
sedimentary
Cupronickel Coin
Copper-Nickel Alloy (typically 75% Cu, 25% Ni)
anthropic metallic specimen
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Rough Diamond
Carbon (C)
mineral
Piddock-bored Mudstone
Lutite (Siltstone or Mudstone) with Pholad borings
sedimentary
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Echinoid Fossil (Sea Urchin Fossil)
Echinoidea (phylum Echinodermata), often preserved as Calcite (CaCO3)
sedimentary
Eclogite
Eclogite (Omphacite + Almandine-Pyrope Garnet)
metamorphic
Eclogite
Eclogite (Omphacite + Pyrope)
metamorphic
Coralline Algae / Maerl
Lithothamnion (Biogenic Calcium Carbonate)
sedimentary
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Fossilized Shark Tooth
Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)
sedimentary
Kimberlite
Kimberlite (Group I or II)
igneous
Fossilized Brachiopod/Bivalve in Limestone
Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)
sedimentary
Fossilized Stingray Mouth Plate
Myliobatidae dental battery
sedimentary
Peridotite (with Olivine)
Peridotite (rich in Olivine, (Mg,Fe)2SiO4)
igneous
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Peridotite
Ultramafic intrusive rock (Peridotite)
Igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral