Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion, SiO2
mineral
Greenstone
Greenschist (containing chlorite, epidote, and actinolite)
metamorphic
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)
Chert (microcrystalline quartz)
Metamorphic Rock
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Olivine
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Banded Agate (Polished Slice)
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Serpentine Jade (New Jade/Olive Jade)
Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite
Mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities, SiO2 + Fe2O3)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Orbicular Granite
Orbicular Granidiorite / Plutonic Igneous Rock
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Amazonite
Microcline (variety Amazonite) - K(AlSi3O8)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Yellow Quartz (Citrine Quartzite)
Silicon Dioxide (SiO2)
mineral
Diamond (or Cubic Zirconia simulant)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Amazonite (with smoky quartz/red jasper inclusions)
Tectosilicate - Microcline Feldspar (KAlSi3O8)
Mineral
Rhodonite
Rhodonite (Manganese silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Orca Agate
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Tiger's Eye
Pseudomorph of Crocidolite (SiO2 with iron oxides)
mineral
Silver (Native Element / Alloy)
Silver (Ag)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Granite
Granite (compositionally: Quartz, Feldspar, Mica)
igneous
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Iron Ore / Ironstone Concretion
Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.
Mineral, specifically an iron ore
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Biotite Schist
Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Quartz
Quartz (SiO₂)
Mineral
Aragonite (variety 'Flos Ferri')
Aragonite (CaCO3)
Mineral
Titanium Quartz (Rough)
Titanium-included Silicon Dioxide (SiO2 + Ti)
mineral
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2)
igneous
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral