Mineral (Specifically A Variety Of Quartz)

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Peach Moonstone (Orange/Peach Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Rough Quartz (likely Rose or Amethyst variety)

Silicon Dioxide (SiO2)

Sandstone (specifically Flagstone)

Arenite (primarily composed of SiO2)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Banded Agate (variety of Chalcedony)

Agate (SiO2)

Chert

Chert (Microcrystalline Quartz, SiO2)

River Cobble (Basaltic/Andesitic)

Mafic Igneous Porphyritic Rock

Conglomerate

Conglomerate (Clastic sedimentary rock)

Moonstone (specifically White Moonstone/Adularia)

Potassium aluminum silicate ((K,Na)AlSi3O8)

Garnet (specifically Almandine or Pyrope)

Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)

Chalcedony (specifically Agate or Water-worn Quartzite)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Commonly known as Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint (River Pebble)

Cryptocrystalline Quartz (SiO2)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Quartzite Pebbles

Quartzite (SiO2)

Jasper

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

Chert (specifically Gray/Tan Chert Node)

Microcrystalline Quartz (SiO2)

Conglomerate

Conglomerate rock

Chert (often called Flint in this variation)

Silicon dioxide (SiO2) - Microcrystalline quartz

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Green variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (varieties: Flint or Chalcedony)

Microcrystalline Quartz (SiO2)

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)

Orthoceras Fossil in Limestone

Orthoceras regulare (Class Cephalopoda; Order Orthocerida)

Dendritic Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Geode (Quartz chalcedony variety)

SiO2 (Silicon Dioxide)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Jasper River Stone

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

Amethyst

Quartz (SiO2) with trace iron impurities

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)

Silicon Dioxide (SiO2)