Mineraloid (Organic)

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2 - Silicon Dioxide)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Marble

Recrystallized Carbonate Rock (CaCO3)

Mookaite (Mookaite Jasper)

Silicified Radiolarite (SiO2 with iron oxides)

Amber Flint (Chert)

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Petrified Wood

Silicified Wood (SiO2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Quartzite

Quartzite (SiO2)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Quartzite

Quartzite (SiO2)

Greenschist

Greenschist (Chlorite Schist)

Quartzite with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 impurities

Gneiss

Gneiss (High-grade regional metamorphic rock)

Fossiliferous Chert (Gryphaea Fossil)

Silicon Dioxide (SiO2) with Calcitic Mollusk Remnants

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Quartzite

Quartzite (primarily SiO2)

Chert (Chert / Flint nodule)

Silicon Dioxide (SiO2)

Chert / Flint Nodule

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Mookaite Jasper

Silicon Dioxide (SiO2) with impurities

Quartzite

Quartzite (primarily SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Quartzite

Quartzite (SiO2)

Limonite-stained Quartzite

Quartzite with Limonite (FeO(OH)·nH2O) staining

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Yellow Jasper

Chalcedony (SiO2) with goethite or limonite inclusions

Greenstone / Diorite

Intermediate plutonic igneous rock

Quartz with Mica/Chlorite inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Quartzite

Quartzite (SiO2)

Chert (Nodule)

Microcrystalline Silica (SiO2)

Granite

Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)

Limestone (Cliff Formation)

Limestone (predominantly CaCO3 as calcite)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert

Silicon dioxide (SiO2)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Chert (Hagstone/Gasket Rock variant)

Chert (SiO2)

Crinoid Stem Fossil

Class Crinoidea (Phylum Echinodermata), primarily Calcium Carbonate (CaCO3)