Man Made Material (Jewelry, Metal Alloy)

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

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Mineral

Chert (Cherty Limestone or Flint)

Microcrystalline Silica (SiO2)

sedimentary

Granite

Granite (a felsic intrusive igneous rock)

igneous

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

sedimentary

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Igneous

Quartz

Quartz (SiO₂)

Mineral

Orbicular Jasper

Silicon Dioxide (SiO2), variety of Chalcedony

Mineral

Fluorite

Fluorite (Calcium Fluoride, CaF2)

mineral

Turquoise

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

mineral

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Mineral

Diamond

Diamond (C)

Mineral

Quartz

Quartz (SiO₂)

Mineral

Obsidian

Volcanic glass

igneous

Diamond

Diamond (C)

Mineral

Chert

Chert (variant of microcrystalline quartz)

Sedimentary

Hematite

Hematite (Fe2O3)

mineral

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)

Metamorphic rock (for both Nephrite and Jadeite)

Jasper

Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)

Mineral

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Sedimentary Rock

Travertine (used in construction, not a 'specimen' in situ)

Travertine

Sedimentary

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Mineral

Citrine

Quartz (SiO₂)

Mineral

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Mineral

Citrine Quartz

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Mineral

Sodalite (blue beads) and Clear Quartz (clear beads)

Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2

mineral

Granite

Granite (Felsic intrusive igneous rock)

igneous

Chalcedony or Chert/Jasper with secondary mineral staining

SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.

Mineral, potentially a rock with chalcedony/jasper.