Green Quartz (Aventurine or Prase)
Silicon Dioxide (SiO2) with inclusions
mineral
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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Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Quartz Geode or Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Chert (Jasper-rich)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Unidentified weathered rock fragments
Likely mixed silicate rocks; specific identification requires testing
mineral
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
sedimentary
Quartz (with Iron staining)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Geode (Unopened)
Siliceous Concretion / Geode
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Jasper
Chalcedony (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica, SiO2)
sedimentary
Bismuth Crystal
Bismuth (Bi)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Greenstone (Diabase or Metabasalt)
Metamorphosed Mafic Igneous Rock
metamorphic
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Lavender Quartz (appearing as beads) and Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Agate Geode Slice with Druzy Quartz
Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Goldstone (blue-goldstone–style glass) beads
Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral
mineral
Banded Siltstone
Banded Siltstone / Laminated Siltstone
sedimentary
Ferruginous Quartz / Iron-Stained Quartz
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
mineral
White Quartz (Tumbled/Waterworn)
Silicon Dioxide (SiO2)
mineral
Petrified Wood and Mixed Rocks
Silicified Wood (SiO2)
fossil
Weathered quartz-rich cobble, possibly milky quartz with iron staining
Quartz (SiO₂), likely with iron-oxide/hydroxide coatings and minor host-rock inclusions
mineral
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Mineral
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Greenstone
Greenschist (containing chlorite, epidote, and actinolite)
metamorphic
Red Jasper Cube
SiO2 (microcrystalline quartz)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary