Diamond (Green tinted)
Carbon (C) with trace impurities or lattice defects
mineral
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Olivine (likely Peridot variety)
Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4
Mineral
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (often called Jasper in this color variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chondrite Meteorite Fragment
Ordinary Chondrite (L or H type)
igneous
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Yellow Jasper / Chert
Jasper (Silica/Quartz) - SiO2
sedimentary
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
sedimentary
Nephrite Jade (River Bed Pebble)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Chert (Nodule / Geode fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
sedimentary
Obsidian
Volcanic Glass (predominantly SiO2, approximately 70% or more)
igneous
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
Mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Anthracite Coal
Anthracite
metamorphic
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Common Opal)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Chert (Nodule)
Chert (primarily Microcrystalline Quartz - SiO2)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·n(H2O)
mineral
Diamond
Cubic Carbon (C)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron inclusions - SiO2)
Sedimentary/Metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fancy Jasper (Agate/Chert mix)
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Jasper/Flint Pebble)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
mineral (silicate-replaced organic material)
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary