Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Limonite
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
metamorphic
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
sedimentary (geologically classified as a variety of chalcedony/quartz)
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
sedimentary
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Amber
Succinite (fossilized resin, C10H16O)
mineral
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Rough Quartz (or Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Ruby in Kyanite
Corundum (Al2O3) in Kyanite (Al2SiO5)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Siltstone with Quartz Vein
Siltstone (primarily SiO2, Al2O3, Fe2O3)
sedimentary
Banded River Rock / Gneiss (highly weathered)
Gneiss
Metamorphic rock
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Sandstone (with Iron Oxide)
Arenite with Limonite/Hematite staining
sedimentary
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with dendritic inclusions
mineral
Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Sandstone
Arenite
sedimentary
Chrysoprase
Silicon dioxide with nickel impurities (SiO2 + Ni)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral