Mixed (Sedimentary, Igneous, And Metamorphic)

Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)

Mineral

Amethyst

SiO2 (Silicon Dioxide)

Mineral

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

metamorphic

Ruby in Zoisite

Anyolite (Zoisite with Corundum) Member of the Epidote Group

metamorphic

Yellow Aventurine (Yellow Quartz)

Silicon Dioxide (SiO2) with inclusions of Muscovite or Mica

Mineral (variant of Quartz)

Green Quartz (Aventurine)

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

mineral

Fluorite

Calcium Fluoride (CaF2)

mineral

Quartz Druze on Matrix (Geode Fragment)

Quartz (Silicon Dioxide, SiO2)

mineral

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

mineral

Pyrite

Iron Sulfide (FeS2)

mineral

Carnelian

Carnelian (SiO2, Silicon Dioxide with Iron Oxide impurities)

mineral

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

sedimentary

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

metamorphic

Greenstone (possibly Basalt or Greenschist)

Greenschist (composed primarily of chlorite, actinolite, and epidote)

Metamorphic (low-grade)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

sedimentary (geologically classified as a variety of chalcedony/quartz)

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar

mineral

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a feldspar mineral (KAlSi3O8 or NaAlSi3O8 respectively, often a mixture)

mineral

Schist

Metamorphic

Aquamarine

Beryl (Be3Al2Si6O18)

mineral

Smoky Quartz

Quartz (SiO₂)

Mineral

Fluorite

Calcium Fluoride (CaF2)

mineral

Carnelian

Cryptocrystalline Quartz (SiO2 with iron oxide impurities)

mineral

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

mineral

Carnelian Agate/Jasper blend

Silicon Dioxide (SiO2) - variety of Chalcedony

mineral

Banded Agate (specifically Moss Agate or Plume Agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

mineral

Gold

Gold (Au)

Mineral

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

metamorphic

Rhodonite in Matrix

Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3

mineral

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary/metamorphic

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

igneous

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)

Granite or Granitic Gneiss River Rock

Granite / Gneiss

Igneous or Metamorphic

Granitic Pegmatite Intrusion in Host Rock

Pegmatite dike in amphibolite or schist

igneous and metamorphic

Granitoid (Granite/Gneiss)

Granitoid silicate rock, primarily quartz and feldspar

igneous/metamorphic

Riverstone (Quartzite/Granite Cobble)

Silicon Dioxide (SiO2) based Quartzite or Silicate-rich Granite

metamorphic or igneous

Granodiorite (Gneissic Pebble)

Granodiorite displaying minor foliation

igneous/metamorphic

Quartz Vein in Host Rock (Gabbro or Basalt)

Silicon Dioxide (SiO2) with Mafic Silicates

metamorphic/igneous

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Matrix

igneous/metamorphic

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Metamorphic Rock

Fluorite

Calcium Fluoride (CaF2)

mineral

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

mineral

Green Fluorite

Calcium Fluoride (CaF2)

mineral