Rock Identifier

Category

Not A Rock (Man Made Origin)

Browse not a rock (man made origin) specimens identified by the Rock Identifier community.

Diamond Plate (Steel) (Alloyed Carbon Steel or Aluminum with 'Durbar' pattern) — not a rock (Man-made industrial metal)

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

not a rock (Man-made industrial metal)

Rainbow Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Amber (Rough) (Amber (Fossilized Tree Resin, succinite)) — mineral

Amber (Rough)

Amber (Fossilized Tree Resin, succinite)

Ferrous Slag (Fused calcium-iron silicates (Industrial Slag)) — Anthropogenic/Industrial byproduct

Ferrous Slag

Fused calcium-iron silicates (Industrial Slag)

Anthropogenic/Industrial byproduct

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

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

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)

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

Milky and Ferruginous Quartz

Silicon Dioxide (SiO2)

Quartz (with Iron staining) (Silicon Dioxide (SiO2)) — mineral

Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Diamond (Diamond (Pure Carbon, C)) — mineral

Diamond

Diamond (Pure Carbon, C)

Quartz (Smoky/Milky variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Goldstone (Avventurina (Cu + SiO2 glass)) — mineral

Goldstone

Avventurina (Cu + SiO2 glass)

Rough Amber (likely Copal or immature Amber) (Organic gemstone / Succinite (if Baltic)) — mineral

Rough Amber (likely Copal or immature Amber)

Organic gemstone / Succinite (if Baltic)

River Rock (Sedimentary Rock (various compositions)) — sedimentary

River Rock

Sedimentary Rock (various compositions)

Tektite (Indochinite) (Tektite (Amorphous Silica Glass), SiO2(Al2O3)) — igneous

Tektite (Indochinite)

Tektite (Amorphous Silica Glass), SiO2(Al2O3)

Turquoise (Tumbled/Polished) (Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (Tumbled/Polished)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Serpentine (Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)) — metamorphic

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Granite (Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Diamond (set in jewelry) (Diamond (Carbon, C)) — mineral

Diamond (set in jewelry)

Diamond (Carbon, C)

Quartz (Pebble) (Quartz (SiO₂)) — Mineral

Quartz (Pebble)

Quartz (SiO₂)

Diamond (as featured in jewelry) (Diamond (C - pure carbon)) — mineral

Diamond (as featured in jewelry)

Diamond (C - pure carbon)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Amber (Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O) — Organic mineraloid

Amber

Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O

Organic mineraloid

Brain Coral Fossil (Family Mussidae or Merulinidae (Order Scleractinia)) — sedimentary

Brain Coral Fossil

Family Mussidae or Merulinidae (Order Scleractinia)

Granite (Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)

Quartz (likely Milky Quartz or Chalcedony) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Peridot (Olivine) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Quartz (Milk/Citrine variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milk/Citrine variety)

Silicon Dioxide (SiO2)

Amethyst (SiO2 (Silicon Dioxide)) — Mineral

Amethyst

SiO2 (Silicon Dioxide)

Slag (Industrial Glass Slag) (Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)) — Mineraloid (Industrial byproduct)

Slag (Industrial Glass Slag)

Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)

Mineraloid (Industrial byproduct)

Chert (containing fossil leaf impression) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (containing fossil leaf impression)

Microcrystalline silicon dioxide (SiO2)

Synthetic Convention Badge (Plastic/PVC) (Polyvinyl Chloride (PVC) / Polycarbonate) — mineraloid (synthetic)

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

mineraloid (synthetic)

Diamond (Cut jewelry specimen) (Diamond (pure Carbon, C)) — mineral

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Ruby in Matrix (Corundum (Al2O3)) — mineral

Ruby in Matrix

Corundum (Al2O3)

Chert (specifically Flint Arrowhead) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Prehnite (Prehnite - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Biological Bone (Patella/Knee) (Patella (part of the Human Skeletal System)) — Organic Structure (Not a Rock)

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Organic Structure (Not a Rock)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Rhodonite, Gray Moonstone, and White Feldspar Mix (Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)) — mineral

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)