Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Category
None
Browse none specimens identified by the Rock Identifier community.
Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Note: Item is not a geological specimen
n/a
none
Gold Nugget
Native Gold (Au)
mineral
Tektite (Indochinite)
Tektite (Silica-rich natural glass)
mineral
Gold Nugget
Native Gold (Au)
mineral
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Shungite
Non-crystalline carbonoid (Shungite)
metamorphic
Native Gold
Gold (Au)
mineral
Black Jasper (Black Onyx substitute)
Silicon Dioxide (SiO2) with carbonaceous impurities
sedimentary (microcrystalline quartz)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint Nodules in Sandstone
Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock
sedimentary
Agate
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Quartzite Arrowhead (Archaeological Lithic)
Recrystallized Quartz (SiO2)
metamorphic
Chert (and/or Siltstone River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically Chalcedony or Flint variation)
Microcrystalline Quartz (SiO2)
sedimentary
Moqui Marbles
Iron Oxide Concretion (Hematite/Goethite)
sedimentary
Agate Geode Node
Cryptocrystalline Quartz (SiO2)
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Fire Opal (Common/Precious in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Amygdaloidal Basalt with Agate/Chalcedony Infills
Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)
igneous
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite (River Pebble)
Recrystallized Quartz (SiO2)
metamorphic
Green Quartz / Aventurine
Silicon Dioxide (SiO2) with inclusions
Metamorphic
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Fancy Jasper
Silicon Dioxide (SiO2) with impurities
mineral
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Obsidian / Chert (Arrowhead Artifact)
Obsidian (volcanic glass, SiO2 with impurities)
igneous
Gold Nugget
Native Gold (Au)
mineral
Chalcedony (Agatized Coral / Rough Chalcedony Node)
Silicon Dioxide (SiO2)
mineral
Citrine (Heat-treated Amethyst)
Citrine Quartz (SiO2)
Mineral (Tectosilicate)
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Mineral
Chert (specifically Flint or Common Chert)
Silicon Dioxide (SiO2)
sedimentary
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral