Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
Sandstone
Arenite
sedimentary
Native Gold
Native Gold (Au)
mineral
Basalt with vesicles
Vesicular Basalt
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Olivine
Olivine group (Mg, Fe)2SiO4
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Chert (Jasper/Common Opal mix)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Yellow Jasper variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Silver (Native Element)
Ag (Argentum)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Golden Quartz / Iron-stained Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions (Goethite or Limonite)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Gold
Native Gold (Au)
mineral
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Quartzite and Jasper Pebbles
Quartzite (re-crystallized Quartz) and Cryptocrystalline Quartz (SiO2)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Native Copper Nugget
Native Copper (Cu)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Basalt
Mafic volcanic rock (primarily Plagioclase and Pyroxene)
igneous
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Aragonite (Flos Ferri)
Calcium Carbonate (CaCO3)
mineral
Quartz / Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic