Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Mineral
Category
Tektite (Natural Glass)
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Green Aventurine
Silicon dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (variety of Quartz)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Green Aventurine (Quartz)
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (specifically Iron-stained Quartz Sandstone)
sedimentary
Quartz (likely heat-treated or colored cord)
Silicon Dioxide (SiO2)
mineral
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Yellow Quartz or Citrine
Silicon Dioxide (SiO2)
mineral
Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Diamond (or Diamond Simulant)
Carbon (C) or Zirconium dioxide (ZrO2) for CZ
gemstone
Dyed Tumbled Quartz
Silicon Dioxide (SiO2) with artificial pigment
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Small polished dark mineral or gemstone fragment
Indeterminate; possibly smoky quartz, obsidian, or dark tourmaline
mineral
Tumbled chalcedony or agate pebble
Microcrystalline quartz (SiO₂), likely chalcedony with possible iron-oxide inclusions
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Quartz Veined Quartzite or Sandstone
Quartzite with Quartz Veins (SiO2)
sedimentary
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rhinestone (or glass crystal)
Silicon dioxide (if glass) / Various
Mineral/gemstone imitation
Yellow Quartz (Citrine/Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe4+)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Amethyst on Basalt Matrix
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Citrine Quartz (or Heat-Treated Amethyst / Smoky Quartz)
Silicon Dioxide (SiO2)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Citrine
Silicon Dioxide (SiO2) - Macrocrystalline Quartz variety
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral