Rock Identifier

Category

Unknown

Browse unknown specimens identified by the Rock Identifier community.

Unknown Rock (Unknown) — rock

Unknown Rock

Unknown

Unknown White Specimen (Unidentifiable due to blurriness) — mineral

Unknown White Specimen

Unidentifiable due to blurriness

Unknown Rock Fragment (Unknown) — unknown

Unknown Rock Fragment

Unknown

Unknown white fragment (Unknown) — unknown

Unknown white fragment

Unknown

Unknown Rock (Unknown) — unknown

Unknown Rock

Unknown

Unidentified Rock (Unknown) — sedimentary

Unidentified Rock

Unknown

Unidentified Small Rock (Unknown) — undetermined

Unidentified Small Rock

Unknown

Iron-stained weathered rock (Unknown) — Unknown (likely sedimentary or metamorphic)

Iron-stained weathered rock

Unknown

Unknown (likely sedimentary or metamorphic)

Unknown Rock Fragment (Unknown) — unknown

Unknown Rock Fragment

Unknown

Unidentified dark pebble (Unknown) — rock

Unidentified dark pebble

Unknown

Tumbled stone (Unknown) — mineral

Tumbled stone

Unknown

Unidentified dark pebble (Unknown) — unknown

Unidentified dark pebble

Unknown

Unknown Dark Stone (Unknown) — igneous

Unknown Dark Stone

Unknown

Unidentified Rock Fragment (Unknown) — Rock

Unidentified Rock Fragment

Unknown

Unable to Identify (Image Obscured) — Indeterminate

Unable to Identify (Image Obscured)

Note regarding image quality — Indeterminate

Note regarding image quality

Unknown Rock Fragment (Undetermined) — igneous

Unknown Rock Fragment

Undetermined

Blue gemstone in a decorative setting (possibly blue spinel or sapphire) (Unidentified blue faceted gemstone; sapphire is corundum (Al₂O₃), while spinel is MgAl₂O₄) — gemstone

Blue gemstone in a decorative setting (possibly blue spinel or sapphire)

Unidentified blue faceted gemstone; sapphire is corundum (Al₂O₃), while spinel is MgAl₂O₄

Dark polished stone, possibly a pebble (Undetermined; image lacks detail for reliable identification) — mineral

Dark polished stone, possibly a pebble

Undetermined; image lacks detail for reliable identification

Gem-set gold ring (Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring) — gemstone

Gem-set gold ring

Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring

Dyed red crystal aggregate, likely quartz or salt (Uncertain; possibly dyed quartz (SiO₂) or halite (NaCl)) — mineral

Dyed red crystal aggregate, likely quartz or salt

Uncertain; possibly dyed quartz (SiO₂) or halite (NaCl)

Small blue-gray mineral fragment (undetermined) (Unidentified from the image; no reliable mineral identification is possible from color and appearance alone.) — mineral

Small blue-gray mineral fragment (undetermined)

Unidentified from the image; no reliable mineral identification is possible from color and appearance alone.

Small gray rock fragment (Unidentified rock; the image lacks enough detail for reliable mineral identification) — igneous

Small gray rock fragment

Unidentified rock; the image lacks enough detail for reliable mineral identification

Small brown stone (indeterminate) (Unidentified; the image does not show enough detail for a reliable identification) — mineral

Small brown stone (indeterminate)

Unidentified; the image does not show enough detail for a reliable identification

Small brown mineral/rock fragment (unidentified) (Undetermined from the image; no reliable species identification is possible from appearance alone.) — mineral

Small brown mineral/rock fragment (unidentified)

Undetermined from the image; no reliable species identification is possible from appearance alone.

Dark gray river pebble (Undetermined fine-grained mafic or intermediate rock; composition cannot be identified reliably from the image) — igneous

Dark gray river pebble

Undetermined fine-grained mafic or intermediate rock; composition cannot be identified reliably from the image

Pink halite (rock salt) (Halite (NaCl)) — mineral

Pink halite (rock salt)

Halite (NaCl)

Unidentified polished mineral specimen (Indeterminate; likely a pale feldspar or quartz-bearing material) — mineral

Unidentified polished mineral specimen

Indeterminate; likely a pale feldspar or quartz-bearing material

Unknown Tumbled Stone (Unknown (Too Blurry)) — mineral

Unknown Tumbled Stone

Unknown (Too Blurry)

Small porous rock (possibly vesicular volcanic rock) (Undetermined; possibly vesicular basalt or scoria) — igneous

Small porous rock (possibly vesicular volcanic rock)

Undetermined; possibly vesicular basalt or scoria

Likely silver-gray metallic ore fragment (Unidentified metallic mineral; possibly galena (PbS), but the image is insufficient for a confident identification) — mineral

Likely silver-gray metallic ore fragment

Unidentified metallic mineral; possibly galena (PbS), but the image is insufficient for a confident identification

Small brown mineral or rock fragment (Undetermined; the image lacks enough detail for a reliable identification) — mineral

Small brown mineral or rock fragment

Undetermined; the image lacks enough detail for a reliable identification

Possible iron-nickel meteorite (Unclassified suspected meteorite; composition and origin cannot be confirmed from the image) — meteorite

Possible iron-nickel meteorite

Unclassified suspected meteorite; composition and origin cannot be confirmed from the image

Likely halite (rock salt) (Halite, NaCl) — mineral

Likely halite (rock salt)

Halite, NaCl

Unidentifiable blurred specimen (Cannot be determined from the image) — mineral

Unidentifiable blurred specimen

Cannot be determined from the image

Unidentified small rock fragment (Undetermined; the photo does not show enough detail for reliable mineral identification.) — igneous

Unidentified small rock fragment

Undetermined; the photo does not show enough detail for reliable mineral identification.

Fossilized tooth (possibly a shark tooth) (Indeterminate vertebrate tooth; species cannot be confirmed from this image) — fossil

Fossilized tooth (possibly a shark tooth)

Indeterminate vertebrate tooth; species cannot be confirmed from this image

Rounded gray pebble, likely granite or a similar crystalline rock (Undetermined; possibly granitic rock composed mainly of quartz, feldspar, and dark mica) — igneous

Rounded gray pebble, likely granite or a similar crystalline rock

Undetermined; possibly granitic rock composed mainly of quartz, feldspar, and dark mica

Small pale stone (unidentified) (Undetermined; image detail is insufficient for reliable identification) — mineral

Small pale stone (unidentified)

Undetermined; image detail is insufficient for reliable identification

Small brown stone, possibly a weathered quartz-rich pebble (Undetermined; the image does not show enough detail for a reliable identification) — mineral

Small brown stone, possibly a weathered quartz-rich pebble

Undetermined; the image does not show enough detail for a reliable identification

Small brown mineral fragment, possibly amber-colored quartz or chalcedony (Undetermined from image; quartz/chalcedony (SiO₂) is one possibility) — mineral

Small brown mineral fragment, possibly amber-colored quartz or chalcedony

Undetermined from image; quartz/chalcedony (SiO₂) is one possibility

Yellow-brown stone or mineral fragment (Unidentified; the image does not show enough detail for a reliable identification) — mineral

Yellow-brown stone or mineral fragment

Unidentified; the image does not show enough detail for a reliable identification