Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
metamorphic
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
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Polished stromatolite (likely fossilized microbial mat)
Fossil stromatolite; chiefly microcrystalline quartz (SiO₂), commonly replacing carbonate
fossil
Polished banded jasper (likely red jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain
gemstone
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone Concretion
Sedimentary concretion
Sedimentary
Blue gemstone cross pendant
Likely faceted blue topaz (Al₂SiO₄(F,OH)₂); identification is uncertain from the image
gemstone
Polished goniatite fossil limestone
Goniatite-bearing Devonian–Carboniferous limestone; fossil cephalopod shells (Goniatitida) in calcite-rich matrix
fossil
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Quartzite pebble
Quartzite (SiO2)
metamorphic
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Polished hematite
Hematite, iron(III) oxide (α-Fe₂O₃)
mineral
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
igneous
Yellow faceted gemstone, likely citrine or yellow sapphire
Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)
gemstone
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Blue faceted gemstone, likely synthetic sapphire or blue glass
Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually
gemstone
Amber-set ring
Amber (fossilized plant resin; organic mineraloid), set in a metal ring
gemstone
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Gemstone ring (stones not reliably identifiable from the image)
Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually
gemstone
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Carved yellow stone butterfly
Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone
mineral
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green jasper (possibly dyed or coated)
Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony
mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Red jasper (likely)
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert or silicified sedimentary fragment (tentative)
Microcrystalline quartz (SiO₂), possibly silicified limestone or fossil-bearing chert
sedimentary
Beaded mineral/crystal jewelry (likely turquoise and coral accents)
Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials
gemstone
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Diamond
Diamond (pure Carbon, C)
mineral
Chert (Flint nodule)
Chert (SiO2)
sedimentary
Chert (Polished River Pebble)
Chert (SiO2)
sedimentary