Limestone

Yellow Calcite

Calcium Carbonate (CaCO3)

Celestine (or Celestite)

Strontium sulfate (SrSO4)

Chert (Jasper/Quartzite river pebble)

Microcrystalline Silica (SiO2)

Lapis Lazuli

Na8(Al6Si6O24)S2 (composed primarily of Lazurite, Calcite, and Pyrite)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Red Jasper)

Microcrystalline Quartz (SiO2)

Rough Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Chert (Jasper/Agate variety)

Cryptocrystalline Quartz (SiO2)

Charoite

Charoite (Hydrated silicate of potassium, sodium, calcium, barium and strontium): (K,Sr,Ba)(Na,Ca)2[Si4O10](OH,f)·H2O

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Chert / Flint Pebble

Silicon Dioxide (SiO2)

Chert (Red Jasper)

Microcrystalline Quartz (SiO2)

Chert / Flint

Chert (Microcrystalline Quartz, SiO2)

Chalcedony

Cryptocrystalline Quartz (SiO2)

Chert (Green variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Tan Chert or Flint)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Green Fluorite

Calcium fluoride (CaF2)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Celestite (Celestine)

Celestine (SrSO4)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Chert (with small quartz inclusion)

Microcrystalline Silica (SiO2)

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

Fossiliferous Limestone (Bivalve Fossil)

Calcium Carbonate (CaCO3) with Bivalvia fossil

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Chert (specifically Blue or Grey Chert/Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartzite Pebble

Meta-quartzite

Chert (River Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Calcite

Calcium Carbonate (CaCO3)

White Marble

Recrystallized Calcite (CaCO3)

Chert / Microcrystalline Quartz

Chert (SiO2)

Chert (Pebble)

Microcrystalline silica (SiO2)

Chert (often called Flint or Jasper)

Microcrystalline or cryptocrystalline Quartz (SiO2)

White Marble Pebble

Recrystallized Calcite (CaCO3)

Rugose Coral Fossil (Horn Coral)

Order Rugosa (common genera include Zaphrentis or Heliophyllum)

Chert (Yellow or Ochre Jasper variant)

Microcrystalline Quartz (SiO2)

Pink Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)