Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Learn about Mineral Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Morganite Crystal

Morganite Crystal

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Purple Dyed Agate Geode (Banded Chalcedony) (Silicon Dioxide (SiO2) - variety: Agate) — mineral

Purple Dyed Agate Geode (Banded Chalcedony)

Silicon Dioxide (SiO2) - variety: Agate

Granite Cobble (Granite) — igneous

Granite Cobble

Granite

Banded Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Golden Calcite (Calcium Carbonate (CaCO3)) — mineral

Golden Calcite

Calcium Carbonate (CaCO3)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

Moonstone (Orthoclase feldspar ((K,Na)AlSi3O8)) — mineral

Moonstone

Orthoclase feldspar ((K,Na)AlSi3O8)

Milky Quartz with Mineral Inclusions (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Small rounded pebble (Unidentified lithic clast; likely fine-grained sandstone, mudstone, or basalt) — sedimentary

Small rounded pebble

Unidentified lithic clast; likely fine-grained sandstone, mudstone, or basalt

Dalmatian Stone (commonly Dyed) (Dalmatian Jasper (Peralkaline igneous rock)) — igneous

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Greenstone / Basalt with Amygdule (Amygdaloidal Basalt (altered to Greenstone)) — igneous

Greenstone / Basalt with Amygdule

Amygdaloidal Basalt (altered to Greenstone)

Iron-rich concretion or weathered ironstone (Goethite–hematite limonite aggregate; commonly described as limonite or ironstone) — sedimentary

Iron-rich concretion or weathered ironstone

Goethite–hematite limonite aggregate; commonly described as limonite or ironstone

Quartz Druze (Silicon Dioxide (SiO2)) — mineral

Quartz Druze

Silicon Dioxide (SiO2)

Quartz (Quartzite or Quartz Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Quartz (Quartzite or Quartz Pebble)

Silicon Dioxide (SiO2)

Granite (Granite (High-silica plutonic rock)) — Igneous

Granite

Granite (High-silica plutonic rock)

Granite with Epidote (Granite, containing quartz, feldspar, and epidote) — Igneous

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Man-made Crystal (Lead Glass) (Lead oxide-doped Silica Glass (approx. SiO2 + PbO)) — Mineraloid/Synthetic Material

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Mineraloid/Synthetic Material

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate)) — gemstone

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate)

Sandstone (Pet Rock) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Pet Rock)

Clastic sedimentary rock (primarily SiO2)

Fluorite in Matrix (Calcium Fluoride (CaF2) with Quartz/Calcite matrix) — mineral

Fluorite in Matrix

Calcium Fluoride (CaF2) with Quartz/Calcite matrix

Pink Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Pink Opal

Hydrated Silica (SiO2·nH2O)

Pyrite and Calcite (or Barite) Specimen (Iron Sulfide (FeS2) with Calcium Carbonate (CaCO3)) — mineral

Pyrite and Calcite (or Barite) Specimen

Iron Sulfide (FeS2) with Calcium Carbonate (CaCO3)

Tumbled pink quartz (probable rose quartz) (Quartz, silicon dioxide (SiO₂), commonly colored by trace elements and microscopic inclusions) — mineral

Tumbled pink quartz (probable rose quartz)

Quartz, silicon dioxide (SiO₂), commonly colored by trace elements and microscopic inclusions

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chalcedony (Agate Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony Pebble (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

White Quartz Sphere (Silicon Dioxide (SiO2)) — mineral

White Quartz Sphere

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Gravel) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Gravel)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Polychrome Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Polychrome Jasper

Microcrystalline Quartz (SiO2)

Clear Quartz Crystal (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Tumbled brown stone, likely tiger’s-eye or jasper (Quartz-rich microcrystalline silica, likely SiO₂ (possible tiger’s-eye; identification uncertain from image)) — mineral

Tumbled brown stone, likely tiger’s-eye or jasper

Quartz-rich microcrystalline silica, likely SiO₂ (possible tiger’s-eye; identification uncertain from image)