Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Category
Man Made Rock Like Material
Browse man made rock like material specimens identified by the Rock Identifier community.
Chert (White/Gray variety)
Chert (SiO2)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartz
Quartz (SiO2)
Mineral
Milky Quartz in Conglomerate Matrix
Silicon Dioxide (SiO2) within Clastic Sedimentary Rock
sedimentary
Chert / Flint
Cryptocrystalline Quartz (Silicon Dioxide, SiO2)
sedimentary
Chert (specifically Yellow Jasper)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (with Desert Varnish/Iron Stain)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite with Hematite cementation
sedimentary
Fossiliferous Rock (likely Dinosaur Fossil in Matrix)
Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)
sedimentary
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Painted Pet Rock (Quartzite/Sandstone base)
Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Laterite
Laterite (Iron and aluminum-rich residual rock)
sedimentary
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Herkimer Diamond
Quartz (SiO2)
mineral
Diorite (Salt and Pepper Rock)
Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)
igneous
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Yellow Quartzite (Iron-Stained Quartzite)
Quartzite (SiO2 with Fe2O3 trace impurities)
metamorphic
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Sandstone (Calcareous or Ferruginous)
Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
metamorphic
Diabase (Greenstone)
Diabase (also known as Dolerite)
igneous
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Mineral
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
sedimentary
Quartz Crystal Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Epidote with Feldspar/Quartz (Unakite-like)
Epidotized Granite (Ca2(Al,Fe)3(SiO4)3(OH) + KAlSi3O8)
metamorphic
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Banded Chert (or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Field Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Mineraloid (Industrial byproduct)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous