Chert / Flint Nodules in Sandstone
Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock
sedimentary
Category
Not A Rock (Animated Character)
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Serpentinite
Serpentinite (complex of lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Ironstone (Limonitic Shale)
Ferruginous Siltstone / Goethite-rich Sedimentary Rock
sedimentary
Black Mountain Stone (Seiryu Stone)
Limestone with Calcite veins (CaCO3)
sedimentary
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Granite
Intrusive Phaneritic Felsic Igneous Rock
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt / Oxidized Vesicular Basalt
igneous
Amethyst
Silicon dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Red Garnet
Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Black Onyx
Silicon Dioxide (SiO2) with cryptocrystalline structure
mineral
Amethyst
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Kambaba Jasper (Crocodile Jasper)
Stromatolite (Fossilized Algae)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
igneous
Clear Quartz (Double Terminated)
Silicon Dioxide (SiO2)
mineral
Amazonite (Amazon Stone)
Tectosilicate Microcline (KAlSi3O8)
mineral
Zircon
Zirconium Silicate (ZrSiO₄)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)
mineral
Banded Agate (specifically Botswana Agate appearance)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Sunstone
Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Golden Sheen Obsidian
Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen
igneous
Labradorite (Larvikite variety)
Ternary feldspar (Anorthoclase), (Na,K)AlSi3O8
igneous
Emerald In Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Native Copper with Cuprite and Quartz
Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)
mineral
Massive Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Emerald In Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral