Sedimentary Sandstone (Sandstone Slab)
Arenite (SiO2 with Fe2O3 staining)
Category
Browse man made material (metal) specimens identified by the Rock Identifier community.
Sedimentary Sandstone (Sandstone Slab)
Arenite (SiO2 with Fe2O3 staining)
Sandstone
Arenite
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Chert (often called Flint when found in chalk)
Microcrystalline Quartz (SiO2)
Chert (Flint Nodules)
Chert (Silicon Dioxide, SiO2)
Pink-and-white quartz-rich rock, likely rose quartz or quartzite
Quartz (SiO₂), possibly rose-quartz-bearing quartzite; minor iron-oxide staining
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Quartz vein in dark host rock
Quartz (SiO₂), likely in basalt, gabbro, or altered mafic rock
Jasper
Microcrystalline Quartz (SiO2)
Chert / Jasper
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Asphalt concrete
Anthropogenic conglomerate
Jasper
Silicon Dioxide (SiO2) with impurities
Jasper
Microcrystalline quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert (Flint Nodule)
Microcrystalline quartz (SiO2)
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Shungite
Non-crystalline carbon (allotrope of carbon)
Likely weathered mica schist fragment
Mica schist, chiefly muscovite/biotite mica with quartz and feldspar
Milky quartz (massive quartz)
Quartz, silicon dioxide (SiO₂)
Chert
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (SiO2)
Travertine
Calcium Carbonate (CaCO3)
Tiger's Eye
Silicon Dioxide (Quartz with crocidolite inclusions), SiO2
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Diamond
C
Chert / Flint
Silicon dioxide (SiO2)
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide), KAl2(AlSi3O10)(OH)2
Diamond (Set in Jewelry)
Carbon (C)
Diamond (or Cubic Zirconia)
Cubic Carbon (C) or Zirconium Dioxide (ZrO2)
Chalky Limestone
Carbonate sedimentary rock (CaCO3)
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint)
Silicon Dioxide (SiO2)
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
Iron-rich laterite or limonite/goethite-bearing rock
Hydrated iron oxides, chiefly goethite (α-FeO(OH)) and limonite (FeO(OH)·nH₂O), likely in a lateritic matrix
Milky quartz–rich rock
Quartz (SiO₂), likely massive milky quartz with minor dark inclusions