Man Made Material (Constructed)

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper)

Silicon dioxide (SiO2)

Slate

Slate (foliated metamorphic rock)

Chert (and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Red Chert / Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Opal variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Yellow Jasper

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Malachite in Matrix

Copper Carbonate Hydroxide (Cu2CO3(OH)2)

Iron Meteorite

Siderite (Fe-Ni alloy, primarily Kamacite and Taenite)

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Tan/Brown)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Amber

Succinite (fossilized resin, C10H16O)

Chert (Chert Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Common Opal/Agate mixture)

Microcrystalline Quartz (SiO2)

Slate

Slate

Flint (Chert)

Silicon Dioxide (SiO2)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)

Quartz (Small fragments)

Silicon Dioxide (SiO2)

Chert (Black Chert or Flint)

Silicon Dioxide (SiO2)

Chert Nodule (Flint)

Chert (Cryptocrystalline Silica - SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Tektite (Indochinite)

Tektite (SiO2 + Al2O3, Glassy Melts)

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

Chert (Jasper/Flint variation)

Chert (SiO2)

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Chrysocolla (with Quartz and Azurite)

Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Banded Calcite (often marketed as 'Mexican Onyx')

Calcite (Calcium Carbonate, CaCO3)

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (and Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (specifically Flint or Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (variously known as Flint or River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Obsidian Arrowhead

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Soapstone (Steatite)

Steatite (primarily Talc: Mg3Si4O10(OH)2)

Banded Calcite (Cave Onyx)

Calcium Carbonate (CaCO3)

Amber

Succinite (C10H16O)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Green Jasper

Jasper (Silicates, SiO2)