Mineral (Silicate Replaced Organic Material)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Cherty Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ruby in Kyanite

Corundum in Disthene (Al2SiO5 + Al2O3)

Beryl (likely Aquamarine or Green Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

White Topaz

Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2

Chert (Jasper-rich)

Microcrystalline/Cryptocrystalline Quartz (SiO2)

Chert (varietal Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (often called Flint when dark)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (specifically Black Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pink Quartz (Rose Quartz)

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Chert (specifically River Stone / Jasper variety)

Microcrystalline Quartz (SiO2)

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (specifically Tan/Yellow Chert)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (and/or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Chert (and Flint)

Cryptocrystalline Quartz (SiO2)

Mookaite Jasper

Silicon Dioxide (SiO2) with impurities

Unakite

Epidotized Granite

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2) with iron oxide impurities

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Chert / Flint

Chert (Cryptocrystalline Quartz, SiO2)

Chert (specifically Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Chalky/Gray Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Quartz Variety)

Chert (Silicon Dioxide, SiO2)

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Schorl (Black Tourmaline) in Quartz and Feldspar

NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Chert (Lightly weathered variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Commonly known as Flint)

Microcrystalline Quartz (SiO2)

Chert (and Limestone)

Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (varieties include Flint and Mudstone)

Microcrystalline Silica (SiO2)

Cobaltoan Calcite / Pink Dolomite (Possible)

Cobaltoan Calcite: (Ca,Co)CO3; Pink Dolomite (or Thulite): CaMg(CO3)2 or Mn-Dolomite / (Thulite: Mn2+3Al2(Si2O7)(SiO4)O(OH))

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)