Mineral, Specifically A Variety Of Quartz

Jasper

Chalcedony (cryptocrystalline quartz), SiO2

Amethyst (Chevron or Dream Amethyst variety)

Tectosilicate Silicon Dioxide (SiO2) with iron impurities

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar

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)

Sandstone (specifically Flagstone)

Arenite (primarily composed of SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Rough Quartz (likely Rose or Amethyst variety)

Silicon Dioxide (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

Chert (Green variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (varieties: Flint or Chalcedony)

Microcrystalline Quartz (SiO2)

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

Orthoceras Fossil in Limestone

Orthoceras regulare (Class Cephalopoda; Order Orthocerida)

Red Jasper

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

Dendritic Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Geode (Quartz chalcedony variety)

SiO2 (Silicon Dioxide)

Jasper River Stone

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Amethyst

Quartz (SiO2) with trace iron impurities