Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)
Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pink Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Quartz Pebble (Hag Stone / Adder Stone)
Silicon Dioxide (SiO2)
mineral
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Liesegang Ring Siltstone
Siltstone with iron oxide Liesegang bands
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Septarian Nodule or Mud Crack Fossil
Septarian Nodule (Concretion)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Chert (specifically White Chert or Novaculite)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Ventifact
Eolian Ventifact (often composed of basalt, chert, or quartzite)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Anthracite Coal
Anthracite (Carbon based fossil fuel)
metamorphic
Septarian Nodule (Yellow Jasper variety)
Septarian Nodule (comprising Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Red Cubic Zirconia (Simulated Garnet)
Zirconium Dioxide (ZrO2)
mineral
White Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Septarian Nodule (Dragon Stone)
Septarian Geode (CaCO3 + Mg + Fe)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Graphite
Graphite (Native Carbon, C)
metamorphic
Chert (variously known as Flint or Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Chert (Red/Pink Jasper subtype)
Silicon Dioxide (SiO2)
sedimentary
Emerald (Faceted Gemstone)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Yellow Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Ironstone Concretion (Ironstone Gourd)
Limonite/Goethite Concretion (FeOO(H))
sedimentary
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rough Diamond
Native Carbon (C)
mineral
Yellow Quartz (Citrine Quartz or Yellow Jasper)
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Banded Agate
Agate (Variety of Chalcedony/Quartz), SiO2
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic