Polished red jasper
Jasper, microcrystalline quartz (SiO₂) colored by iron oxides
mineral
Category
Not A Rock (Synthetic Material)
Browse not a rock (synthetic material) specimens identified by the Rock Identifier community.
Learn about Not A Rock (Synthetic Material) in the encyclopedia
View all →
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Basalt
Basalt (Aphanitic mafic volcanic rock)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Crushed Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Granite
Granite (Silica-rich Plutonic Rock)
igneous
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Green Slate (Greenstone)
Foliated Metamorphic Rock (rich in Chlorite/Epidote)
metamorphic
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Peridotite Nodules in Basalt (Xenolith)
Ultramafic Xenolith (Olivine-rich Peridotite in Basalt)
igneous
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Unakite
Epidote-Feldspar rock
Metamorphic Rock
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Turquoise
Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Green-and-gold apatite-bearing rock, possibly epidote skarn
Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Red Jasper
Jasper (variety of Chert) - SiO2
sedimentary
Quartz-rich pegmatite or quartz vein rock
Mostly quartz (SiO₂), with probable feldspar and iron-oxide staining
igneous
Diabase (Greenstone)
Diabase (also known as Dolerite)
igneous
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Amygdaloidal Basalt
Vesicular and Amygdaloidal Basalt
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Quartz-bearing granite or granitic gneiss cobble
Granite; primarily quartz (SiO₂), feldspar, and mica/amphibole
igneous
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Chert (Nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Polished ocean jasper (orbicular jasper), probable
Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide and other mineral inclusions
mineral
Chalcedony Agate / Carnelian nodules in Matrix
SiO2 (Silicon Dioxide) with iron oxide inclusions
mineral
Weathered chert or siliceous limestone
Microcrystalline quartz (SiO₂), possibly with carbonate minerals
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Jasper Conglomerate (Puddingstone)
Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)
sedimentary
Chert (White/Gray variety)
Chert (SiO2)
sedimentary
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Brown Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Fuchsite
Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Chert (variations include Flint or Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (SiO2)
igneous