Mineral, Often Found In Sedimentary Deposits

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide, SiO2)

Travertine

Travertine (CaCO3 - Calcium Carbonate)

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Chert (specifically Jasper/Carnelian Agate)

Microcrystalline Quartz (SiO2)

Chert (with Quartz Vein)

Microcrystalline silica (SiO2)

Yellow Jasper / Chert

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Quartz Geode

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2)

Emerald

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

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Quartz Geode

Silicon Dioxide (SiO2)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Sandstone

Arenite (primarily SiO2)

Spondylus Oyster Calcification / Fossilized Oyster

Spondylus (Thorny Oyster) / Calcium Carbonate (CaCO3)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Chert (Flint nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

White Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

Chert (with Limestone/Dolomite host)

Microcrystalline Quartz (SiO2)

Jasper (with Manganese or Iron inclusions)

Silicon Dioxide (SiO2)

Agate (specifically Lace Agate or Banded Agate)

Silicon Dioxide (SiO2)

Carnelian (a variety of Chalcedony)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Limonite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Chert (Nodule)

Silicon Dioxide (SiO2)

Diamond

Diamond (Pure Carbon - C)

Chert (Flint)

Microcrystalline Opaline Silica (SiO2)

Chert (Gravel pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Black Sapphire

Corundum (Al2O3 with inclusions of hematite or ilmenite)

Gold Flake

Native Gold (Au)

Pyrite

Iron Disulfide (FeS2)

Brecciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Sandstone (Quartz-rich Pebble)

Arenite (primarily SiO2)

Jasper with Quartz vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining