Man Made Material (Jewelry, Metal Alloy)

Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.

Chert (Jasper/Chalcedony variety)

Microcrystalline Quartz (SiO2)

sedimentary

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

metamorphic

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)

sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)

sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

mineral

Ocean Jasper

Orbicular Jasper (Silicon Dioxide - SiO2)

sedimentary

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Mineral

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

metamorphic

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Banded Calcite (Mexican Onyx)

Calcite (CaCO3)

mineral

Bamboo Leaf Jasper

Silicified Siltstone or Jasper (SiO2)

sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

sedimentary

Chert (Nodular Flint)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (variations include Flint/Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert (often called Flint or Jasper)

Silicon Dioxide (SiO2)

sedimentary

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

sedimentary

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

sedimentary

Drupa Quartz (Sparkly Drusy Quartz on Matrix)

Crystalline Silicon Dioxide (SiO2) on host rock

mineral

Diamond

C (Carbon)

mineral

Jade

Jadeite or Nephrite

Mineral/Mineraloid

Chert (Brown Variety)

Silicon dioxide (SiO2)

sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

sedimentary

Petrified Wood

Silicified Wood (SiO2)

sedimentary

Chert (Nodule)

Microcrystalline Quartz (SiO2)

sedimentary

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral

Fluorite

Calcium Fluoride (CaF2)

mineral

Pink Rhodonite

Manganese Silicate (MnSiO3)

mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral

Pyrite

Iron Sulfide (FeS2)

mineral

Mahogany Obsidian

Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2

igneous

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)

igneous

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)

mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

mineral

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Sedimentary rock