Mineral And Sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)

Quartz Druzy Geode

Silicon Dioxide (SiO2) - Crystalline Variety

Quartz Geode

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Agate (specifically Moss or Plume Agate nodding toward Agatized Wood)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz (Chalcedony)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Banded Calcite (variety Honey Calcite / Chocolate Calcite)

Calcium Carbonate (CaCO3)

Red Hematite (Iron Ore)

Hematite (Fe2O3)

Fluorite

Calcium Fluoride (CaF2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Orange Calcite

Calcium Carbonate (CaCO3)

Agate (Grey Agate Slice)

Microcrystalline Quartz (SiO2)

Rhodochrosite

Manganese carbonate (MnCO3)

Banded Agate (River Stone)

Agate (Silicon Dioxide - SiO2)

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Clear Quartz (Rock Crystal Fragments)

Silicon Dioxide (SiO2)

Chert (Common Opal variant)

Silicon Dioxide (SiO2)

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

Ironstone Concretion (Moqui Marble)

Iron Oxide Concretion (Fe2O3 / FeO(OH) mixed with SiO2)

Spondylus Oyster Calcification / Fossilized Oyster

Spondylus (Thorny Oyster) / Calcium Carbonate (CaCO3)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

Jasper

Cryptocrystalline Quartz (SiO2)

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

Mookaite Jasper

Silicon Dioxide (SiO2) with impurities

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Dalmatian Stone

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Chert (often called Flint)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2)

Quartz Geode

Quartz (Silicon Dioxide - SiO2) within a Chalcedony and Limonite shell

Red Siltstone

Siltstone (composed mainly of SiO2 and Fe2O3)

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

Banded Chert (or Banded Jasper)

Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite/Goethite)

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Jasper)

Ferruginous Sandstone (Gozzan-like)

Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)