Trilobite Fossil (Flexicalymene)
Flexicalymene ouzregui
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Trilobite Fossil (Flexicalymene)
Flexicalymene ouzregui
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - stained microcrystalline quartz
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Dyed Crackle Quartz/Agate (resembling Watermelon Tourmaline)
SiO2 (Silicon Dioxide)
Dyed Blue Agate
Silicon dioxide (SiO2) with artificial pigment
Dyed Howlite
Howlite (Ca2B5SiO9(OH)5)
Dyed Agate
Microcrystalline Quartz (SiO2) with artificial pigment
Dyed Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Sphalerite in Matrix (Polished Point)
Zinc sulfide (Zn,Fe)S
Blue Howlite (Dyed)
Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)
Pink Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Dyed Tumbled Quartz (Dragon's Vein Agate/Quartz)
Silicon Dioxide (SiO2) with artificial dye
Concrete fragment or Conglomerate
Artificial Conglomerate (Concrete) or Natural Conglomerate
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Mixed Tumbled Gemstones
Various silicate and oxide minerals
Mixed Tumbled Gemstones and Minerals
Various silicate and oxide minerals
Dyed Pink Agate
Silicon Dioxide (SiO2) with artificial dye
Small rounded pebble, likely weathered sandstone or iron-stained sedimentary rock
Indeterminate; probable quartz-rich sandstone (SiO₂ with clay/iron-oxide cement)
Dyed Cracked Agate
Silicon Dioxide (Quartz variety, SiO2)
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial dyes
Dyed Agate
Chalcedony (SiO2)
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Dyed Agate
Silicon Dioxide (SiO2) with artificial colorants
Glass
Amorphous Silicon Dioxide (SiO2)
Pink Dyed Agate Geode Slice
Silicon Dioxide (SiO2) with artificial pigment
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Dyed Agate
Microcrystalline Quartz (SiO2) with artificial pigment
Dyed Agate
Silicon Dioxide with artificial pigment (SiO2)
Dyed Pink Agate (or Dyed Quartzite)
Silicon dioxide (SiO2) with artificial pigment
Blue Onyx (Dyed Agate)
Cryptocrystalline Quartz (SiO2) with artificial pigment
Conglomeratic gravel / pebble-rich concrete-like rock
Polymictic conglomerate (likely an unconsolidated gravel surface; exact identification uncertain from the image)
Dyed Blue Agate
Silicon Dioxide (SiO2) with artificial pigment
Peacock Ore (Treated Chalcopyrite)
Copper Iron Sulfide (CuFeS2) coated with oxides
Beads (likely glass or man-made material)
N/A (artificial material)
Blue Goldstone
Goldstone (artificial glass)
Painted River Rock
Artificially Coated Sedimentary Rock
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Crystal cave / solution cave
Karst cave containing speleothems, chiefly calcite (CaCO₃) and sometimes aragonite; likely a stock image rather than an individual specimen
Tumbled River Pebble (Quartzite / Agate)
Silicon Dioxide (SiO2)