Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Matrix
igneous/metamorphic
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Rough Citrine Quartz
Citrine (Silicon Dioxide, SiO2 with iron impurities)
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)
sedimentary
Chert (with Limestone/Marble traces)
Silicon Dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Picture Jasper
SiO2
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
mineral
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granite
Phaneritic plutonic rock (Felsic)
igneous
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Chalcedony (Quartz Pebbles)
Silicon Dioxide (SiO2)
mineral
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Chert (Flint nodule)
Silicon dioxide (SiO2)
sedimentary
Quartz (Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2 with inclusions of Iron Oxide/Chlorite)
mineral
Black Onyx
Chalcedony (SiO2) with parallel banding
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Iron-Stained Quartzite
Quartzite (chemically SiO2 with Fe2O3/FeO(OH) staining)
metamorphic
Pink Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Commonly known as Flint)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
sedimentary
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary