Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Category
Not A Rock (Animated Character)
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Rose Quartz (likely carved)
Rose Quartz (SiO2)
Mineral
Limonite (Yellow Ochre)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Metamorphic Rock (variety of Quartz)
Green Aventurine
Aventurine (Silicon dioxide, SiO₂)
Mineral; variety of Quartz
Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material
Pink Anthracite Coal (dyed)
Anthracite Coal (Artificially Colored)
Sedimentary Rock (Altered)
Serpentine Jade (New Jade/Olive Jade)
Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite
Mineral
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Granite Cobble/Pebble
Granite
Igneous
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Red Jasper (beads)
SiO₂ (Silicon Dioxide)
Mineral, variety of chalcedony (microcrystalline quartz)
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Mineral
Tiger's Eye (commonly referred to as Blue/Gold Tiger's Eye)
Tiger's Eye is a variety of Chalcedony (cryptocrystalline quartz), SiO2, exhibiting chatoyancy. The blue variety is often called Hawk's Eye.
Metamorphic Rock (formed from a fibrous crocidolite asbestos)
K2 Jasper (Beads)
Granodiorite with Azurite and Malachite
igneous
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Granite
Granite (a common igneous rock)
igneous
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Puddingstone
Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)
Sedimentary
Bi-Color Tourmaline (or Watermelon Tourmaline)
Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)
Mineral
Red Garnet
Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)
Mineral
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Mineral
Pearls
Aragonite (calcium carbonate) and Conchiolin
Mineraloid
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions - SiO2)
mineral
Jasper with Pyrite (Gold-colored inclusions)
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
sedimentary (chemical/biological)
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Corundum; Ca2Al3(SiO4)3(OH) + Al2O3
metamorphic
Kyanite
Kyanite (Al2SiO5)
Mineral
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Mineral
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Obsidian
Obsidian (volcanic glass)
Igneous
Quartz (likely a clear or rock crystal variety)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Hematite Beads
Hematite (Fe2O3)
Mineral
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Mineral