Amazonite
K(AlSi3O8) - Potassium Feldspar (Microcline variant)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Rough Citrine Quartz
Citrine (Silicon Dioxide, SiO2 with iron impurities)
mineral
Emerald in Schist (Raw/Tumbled)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities in Mica Schist
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Tiger's Eye
Quartz (SiO2) with fibrous inclusions of Altered Crocidolite
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
Mineral
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Biotite / Black Mica
Biotite K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Black Tourmaline (Schorl)
Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Star Sapphire
Corundum (Al2O3) with Rutile inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Sandstone
Arenite (SiO2 based)
sedimentary
Limonite (Iron Stone/Ocher)
Limonite (FeO(OH)·nH2O)
mineral
Green Aventurine
Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Lavender Agate / Chalcedony Sphere
Agate (Microcrystalline Quartz) - SiO2
mineral
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silica (Quartz) pseudomorph after Crocidolite (SiO2)
metamorphic
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)
mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Petrified Wood
Silicified wood, primarily composed of Quartz (SiO2)
Mineral, often found in sedimentary deposits
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid
Greenstone / Greenschist
Chlorite schist / Meta-basalt
metamorphic
Hand-Drawn Trading Card (Amateur Artwork)
Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)
Organic/Synthetic Composite (Paper and Pigment)
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary
Banded Sandstone (Zebra Stone)
Arenite with Iron Oxide Banding (Liesegang rings)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions (typically Fuchsite/Mica)
metamorphic
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material