Limestone

Chert (Iron-stained)

Chert (SiO2)

Limestone with Algal/Lichen Colonization

Calcium Carbonate (CaCO3)

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Chert and Chalcedony

Cryptocrystalline Quartz (SiO2)

Chert (often called Flint for darker varieties)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (often called Flint when in chalk or limestone)

Silicon Dioxide (SiO₂)

Flint (or Chert)

Cryptocrystalline Quartz (SiO2)

White Marble

Recrystallized Calcite / Calcium Carbonate (CaCO3)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Mica

Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Jade (Nephrite)

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

Nephrite Jade

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

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Soapstone mushroom decorative carving

Steatite (Hydrous magnesium silicate, Mg3Si4O10(OH)2)

Calcite

Calcite (Mineral, Calcium Carbonate - CaCO3)

Marble

Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)

Chert (and Chert Geode)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Chert (Chert / Flint)

Silicon Dioxide (SiO2)

Chert (Limestone-based)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Travertine

Travertine (CaCO3 - Calcium Carbonate)

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (specifically Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Fluorite Tower

Calcium Fluoride (CaF2)

Common Marble

Calcium Carbonate (CaCO3)

Celestite (Celectine)

Strontium sulfate (SrSO4)

Chert

Silicon dioxide (SiO2)

Lapis Lazuli

Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Emerald In Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Green Onyx (Banded Calcite)

Travertine (CaCO3 - Calcium Carbonate)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Chert (specifically Flint or Common Chert)

Chert (Cryptocrystalline Silica, SiO2)

Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)

Recrystallized Calcite (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Banded Chert (Agate-like Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz