Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Quartz with Mica/Chlorite inclusions
Silicon Dioxide (SiO2) with phyllosilicate inclusions
igneous/metamorphic mineral specimen
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper (Silicate Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble (Quartzite / Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble with Hematite Inclusion
Silicon Dioxide (SiO2)
mineral
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
mineral
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
mineral
Iron-Stained Quartz (Riverside Cobble)
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Chert Nodules
Chert (Silicon Dioxide, SiO2)
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)
mineral
Chert (within Limestone)
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3) matrix
sedimentary
Smoky Quartz (Ferruginous Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (varietal Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Quartzite
Quartzite (SiO2 with inclusions)
metamorphic
Quartz Vein Quartzite
Metamorphic Quartzite with Quartz Vein (SiO2)
metamorphic
Blue Quartzite
Quartzite (primarily SiO2 with inclusions)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Labradorite
Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Quartz Pebble with Drusy/Crystalline Pocket
Silicon Dioxide (SiO2)
mineral
Rhodonite with Manganese Oxides
Rhodonite (Mn,Fe,Mg,Ca)SiO3
metamorphic
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary