Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
sedimentary
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Greenschist (Greenstone)
Chlorite Schist / Greenschist Facies Rock
metamorphic
Fossilized Crinoid Stem
Class Crinoidea (Echinodermata)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Unakite
Unakitized granodiorite / Quartz-Epidote-Feldspar rock
metamorphic
Yellow Quartzite Pebble
Metamorphosed Sandstone (SiO2 with iron oxide impurities)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz
sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide - SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Asphalt (Bituminous pavement fragment)
Artificial conglomerate / Bitumen-Aggregate mixture
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Diamond (set in a gold ring)
Carbon (C) - Adamantine cubic carbon
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Chert (SiO2)
sedimentary
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral
Sandstone (Red)
Arenite (Fe2O3 heavy)
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Mineraloid (Man-made)
Scoria (Basaltic)
Vesicular Basalt
igneous
Breccia
Clastic Breccia (General mineral composition depends on fragments, often SiO2 or CaCO3)
sedimentary
Beryl (likely Aquamarine or Green Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Chalcedony
Chalcedony (SiO2)
mineral
River Cobble (likely Basalt or Chert)
Siliceous River Rock / Microcrystalline Quartz / Mafic Igneous
igneous/sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodular)
Cryptocrystalline Quartz (SiO2)
sedimentary
Granodiorite
Granodiorite (Na,Ca)(Si,Al)4O8
igneous
Septarian Nodule Segment (Turtle Stone)
Septarian Concretion (CaCO3 with Siderite or Calcite infill)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Tiger's Eye (likely variant or dark tumble)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) - Native Element
mineral
Uraninite (Pitchblende)
Uranium dioxide (UO2)
mineral