Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)
mineral
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Basalt
Basalt (composition predominately plagioclase feldspar and pyroxene)
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Jadeite (Jade)
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Diamond
Carbon (C)
mineral
Diamond (Cut jewelry specimen)
Diamond (pure Carbon, C)
mineral
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Quartz (specifically Milky or Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt
igneous
Aragonite
Aragonite (Carbonate mineral), CaCO3
mineral
Granite Cobble (River Stone)
Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Diabase (also known as Dolerite)
Diabase
igneous
Epidote (likely Unakite component or Epidosite)
Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Scoria (Lava Rock)
Mafic Vesicular Volcanic Rock
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Slate
Slate (Low-grade foliated metamorphic rock)
metamorphic
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Igneous
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Quartz Pebble (Water-Worn)
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Diamond (Cluster Ring)
Carbon (C)
mineral
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with Elemental Gold (Au)
mineral
Peridot (Olivine)
Olivine, (Mg, Fe)2SiO4
mineral
Arsenopyrite in Quartz/Host Rock
Arsenopyrite (FeAsS)
mineral
Red aventurine
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
metamorphic
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities and irradiation)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2:Fe3+)
mineral
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine (Rough)
Beryl (Be3Al2Si6O18)
mineral
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Limonite with Opal infusion
FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)
mineral
Specular Hematite (Specularite)
Hematite (Alpha-Fe2O3)
mineral
Diamond (appearing in jewelry)
Diamond (pure Carbon, C)
mineral
Citrine (Quartz variant)
SiO2 (Silicon Dioxide)
mineral
Diamond
Diamond (C)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with traces of Iron (Fe3+)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget / Gold-bearing Quartz
Native Gold (Au)
mineral