Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
Mineral (Variety of Quartz)
Category
None
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Tufa
Calcium carbonate (CaCO3) - Porous Limestone
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
mineral
Chert (Flint/Jasper variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper Concretion
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite River Rock
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Chert (Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Bull Quartz (White Quartz)
Silicon Dioxide (SiO2)
mineral
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Tiger's Eye
Titanium-containing Quartz (Silica: SiO2)
Mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Gold and Cubic Zirconia (San Judas Tadeo Pendant)
Native Gold (Au) with Synthetic Cubic Zirconia (ZrO2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe4+ impurities)
mineral
Crystalline Quartz (Rough)
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone Pebble
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 staining)
sedimentary
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
Rose Quartz Sphere
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartzite pebble
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral