Mineraloid (Human Made Geological Specimen)

Chert Nodule (with Ironstone Cortex)

Microcrystalline Silica (SiO2)

Agate

Silicon Dioxide (SiO2) - variety: Chalcedony

Native Copper Nugget

Native Copper (Cu)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Lapis Lazuli (prominent blue specimen in collection)

Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2

Turquoise

Hydrous phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Chert (Jasper focus)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (varieties include Flint or Jasper)

Chert (cryptocrystalline quartz; SiO₂)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (often called Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Cryptocrystalline Quartz (SiO2)

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert Pebble

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Microcrystalline Silica (SiO2)

Native Copper (Penny specimen)

Native Copper (Cu)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Ochre (Hematite-rich Clay)

Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)

Chert (often called Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Granite (tumbled pebble)

Granite (Plutonic Igneous Rock)

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Arrowhead or Projectile Point)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Green Chert (Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Flint variety)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Amber Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Chert (specifically a Chert Nodule or Flint)

Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

Chert / Flint

Chert (Cryptocrystalline Quartz, SiO2)

Banded Chert (River Siltstone)

Microcrystalline Quartz (SiO2)

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limonite and Goethite

Limonite (hydrated iron(III) oxide-hydroxide) and Goethite (α-FeO(OH))

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Chert (and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)