Slate
Metamorphic Pelitic Rock
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Slate
Metamorphic Pelitic Rock
Sandstone
Sedimentary Rock (Quartz arenite)
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert
Chert (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
Chert Arrowhead (Jasper)
Chert (Cryptocrystalline Quartz, SiO2)
Sandstone
Arenite
Diamond (or Diamond Simulant)
Carbon (C)
Diamond in Kimberlite
Diamond (C in Kimberlite)
Chert (Flint nodule)
Chert (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Flint
SiO2 (Cryptocrystalline Quartz)
Brecciated Jasper
Brecciated Jasper (Microcrystalline Quartz / SiO2)
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Chert
Microcrystalline silica (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
Chert Nodule
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (composed primarily of Quartz: SiO2)
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
Tumbled brown chalcedony (likely jasper or agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
Jasper-Agate Conglomerate (Potentially Puddingstone)
Jasper-cemented Silicate Aggregate (SiO2)
Diamond (in jewelry setting)
Diamond (C - Carbon)
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Carved Stone Turtle
Carved Soapstone and Quartz
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Chert
Microcrystalline quartz (SiO2)
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
Flint
Silicon dioxide (Microcrystalline Quartz / Chert)
Chert (or Flint)
Microcrystalline quartz (SiO2)
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Chert (Honey Chert / Flint)
Silicon Dioxide (SiO2)
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
Sandstone (Pebble)
Arenite