Limestone

Chert

Silicon dioxide (SiO2)

Chert (or Agate/Quartzite)

Microcrystalline Quartz (SiO2)

Common Marble

Calcium Carbonate (CaCO3)

Fluorite Tower

Calcium Fluoride (CaF2)

Lapis Lazuli

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

Mixed Agate and Lapis Lazuli Bracelet

Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Celestite (Celectine)

Strontium sulfate (SrSO4)

Chert (Jasper/Agate mix)

Microcrystalline Quartz (SiO2)

Emerald In Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Chert (Flint)

Chert (Cryptocrystalline Silicon Dioxide, SiO2)

Lapis Lazuli

Lapis Lazuli (Complex rock consisting primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2)

Green Onyx (Banded Calcite)

Travertine (CaCO3 - Calcium Carbonate)

Chert (Nodule)

Chert (variety of microcrystalline quartz, SiO2)

Fluorite

Calcium Fluoride (CaF2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Nephrite Jade

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

Green Fluorite

Calcium Fluoride (CaF2)

Lapis Lazuli (Tumbled Specimen)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint or Common Chert)

Chert (Cryptocrystalline Silica, SiO2)

Quartz (likely Chalcedony or Chert)

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variant)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Banded Chert (Agate-like Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Recrystallized Calcite (CaCO3)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Chalcedony)

Microcrystalline Quartz (SiO2)

Chalcedony (Chert/Flint)

Silicon Dioxide (SiO2)

Chert (specifically Gray/Blue-Gray Chert)

Chert (SiO2)

Chert / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Jasper-Quartz Conglomerate / Chert

Siliceous Sedimentary Rock (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Emerald / Green Beryl

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Chert (Flint/Jasper)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Marble

Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)