Rock Identifier

Category

Mineralological Variety

Browse mineralological variety specimens identified by the Rock Identifier community.

Learn about Mineralological Variety in the encyclopedia

Albite

Flame Obsidian

Lace Obsidian

Oligoclase

Brookite

Sodalite

Syenite

Microcline

Leopard Obsidian

Orthoclase

Starry Night Obsidian

Pumpkin Obsidian

Pumpkin Obsidian

Chert / Flint (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Agate (SiO2) — Mineral

Agate

SiO2

Chert (Varietal Agate/Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Varietal Agate/Jasper)

Silicon Dioxide (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Common or Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Common or Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert or Flint (polished/water-worn) (Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.) — Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Quartz (Milky/Gray variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Gray variety)

Silicon Dioxide (SiO2)

Tumbled orange chalcedony or carnelian (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/carnelian) — mineral

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/carnelian

Fossil Coral (Hexagonaria (Rugose coral) / Rugosa) — fossil

Fossil Coral

Hexagonaria (Rugose coral) / Rugosa

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Peach/Pink Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Peach/Pink Variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Likely tumbled brown agate (Microcrystalline quartz (SiO₂), a variety of chalcedony) — mineral

Likely tumbled brown agate

Microcrystalline quartz (SiO₂), a variety of chalcedony

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (including Flint and Jasper variants) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (including Flint and Jasper variants)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Opalite (Synthetic Glass (Simulated Moonstone/Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Chalcedony (Agate/Chert variety) (Silicon Dioxide (SiO2)) — sedimentary

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Sunstone (Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8

River-worn Quartzite / Soapstone (Metamorphic Rock (Quartzite/Talc-schist)) — metamorphic

River-worn Quartzite / Soapstone

Metamorphic Rock (Quartzite/Talc-schist)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Red jasper pebble (likely) (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides) — mineral

Red jasper pebble (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Tumbled chalcedony (likely agate or jasper) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Amethyst crystal point (Quartz, purple variety — silicon dioxide (SiO₂)) — gemstone

Amethyst crystal point

Quartz, purple variety — silicon dioxide (SiO₂)

Chalcedony (Quartz Pebbles) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz Pebbles)

Silicon Dioxide (SiO2)

Carnelian (Cryptocrystalline Quartz (SiO2 with Hematite impurities)) — mineralish (variety of chalcedony)

Carnelian

Cryptocrystalline Quartz (SiO2 with Hematite impurities)

mineralish (variety of chalcedony)

Polished blue-green stone, likely amazonite (Amazonite (microcline feldspar, KAlSi₃O₈)) — mineral

Polished blue-green stone, likely amazonite

Amazonite (microcline feldspar, KAlSi₃O₈)

Dark Emperador Marble (Recrystallized Calcitic Marble) — metamorphic

Dark Emperador Marble

Recrystallized Calcitic Marble

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Green Onyx (Agate) (Silicon Dioxide (SiO2)) — sedimentary

Green Onyx (Agate)

Silicon Dioxide (SiO2)

Quartz (Smoky/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)