Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Category
Organic Gemstone (Fossilized Resin)
Browse organic gemstone (fossilized resin) specimens identified by the Rock Identifier community.
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Citrine
Silicon Dioxide (SiO₂)
mineral
Garnet (Almandine)
Almandine, Fe3Al2Si3O12
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Obsidian (Amorphous Volcanic Glass, SiO2)
igneous
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
K2 Jasper (K2 Granite)
Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)
igneous
Unakite
Epidotized Granite
metamorphic
Emerald in Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Iolite (Cordierite)
Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Kimberlite
Kimberlite
igneous
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Lapis Lazuli (blue bead) and Moss Agate (green heart)
Lapis Lazuli (lazurite-based rock) and Moss Agate (SiO2 with manganese/iron inclusions)
metamorphic (Lapis) and sedimentary/igneous assoc. (Moss Agate)
Unakite
Unakite (Epidotized Granite)
metamorphic
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Topaz (Imperial or Precious Topaz)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Ruby (Raw/Rough)
Corundum (Al2O3 with Chromium trace)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Labradorite (Larvikite variety)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with Monzonite/Syenite matrix
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Mineral
Green Aventurine
Aventurine Quartz (SiO2) with Fuchsite inclusions
metamorphic
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper
Jasper (Silicified microcrystalline quartz) - SiO2
sedimentary