Mineral (Man Enhanced)

Browse mineral (man enhanced) specimens identified by the Rock Identifier community.

Greisen

Metamorphic

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Mineral

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Igneous Rock

Quartz with Mica inclusion

Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions

igneous

Unidentified Rock Fragment

Unknown

Rock

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Mineral/Metamorphic Rock (Nephrite or Jadeite)

Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)

Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.

Metamorphic, Mineral (within a rock type)

Basalt with Vesicular Surface

Basalt (Mafic Extrusive)

igneous

N/A (Non-Geological Object)

N/A

Veined Pebble (likely a Quartz-Veined Pebble)

Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)

Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

sedimentary

Basalt

Igneous

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

sedimentary

Nephrite Jade

Nephrite

Mineral/Rock

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Mineral

Granite

Igneous

Granitoid (Granite/Gneiss)

Granitoid silicate rock, primarily quartz and feldspar

igneous/metamorphic

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

sedimentary

Quartzite with vugs/druzy quartz

Crystalline Silicon Dioxide (SiO2)

metamorphic

The user-provided image does not contain a rock or mineral specimen

N/A

White Marble (Tumbled)

Recrystallized Calcite (CaCO3)

metamorphic

Olivine in Basalt matrix

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

igneous

Agate (translucent pebble)

Silicon dioxide (SiO2) - Microcrystalline Quartz

sedimentary

Note on Image Identification: Textile

N/A (Anthropogenic material)

not a rock

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

mineral

Rhodochrosite (Beads) and Citrine (Pendant)

Rhodochrosite (MnCO3) and Quartz variety Citrine (SiO2)

mineral

Peridot

Olivine (Mg, Fe)2SiO4

Mineral

Rhodonite

Manganese silicate (MnSiO3)

mineral

Pink Granite (Gneissic Granite)

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

igneous

Flint

Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)

Mineral

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

mineral

Pearl

Calcium carbonate (CaCO3) - Aragonite/Calcite variety

mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

mineral

Diamond (in a jewelry setting)

Cubic Carbon (C)

mineral

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

mineral

Serpentine

Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄

Mineral, often found as a rock (metamorphic)

Basalt

igneous

Olivine (Peridot when gem-quality)

Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)

mineral

Zircon

Zircon (ZrSiO4)

Mineral

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

mineral

Pearl

Calcium carbonate (CaCO3) as Aragonite or Calcite

mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

mineral