Mineral (Specifically A Variety Of Quartz)

Banded Gneiss

Gneiss

Caribbean Calcite

Calcium Carbonate with Aragonite (CaCO3)

Fossiliferous Limestone (Crinoidal Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Jasper Conglomerate (Puddingstone)

Jasper Conglomerate (SiO2 matrix with quartz/jasper clasts)

Granite

Phaneritic Felsic Igneous Rock

Belemnite Fossil (Guard)

Belemnoidea (Carbonate/Calcite replacement)

Mahogany Obsidian

Obsidian (volcanic glass with Hematite/Magnetite inclusions)

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (Common Opal/Jasper variety)

Cryptocrystalline Quartz (SiO2)

Yellow Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Pink Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Red/Pink Jasper subtype)

Silicon Dioxide (SiO2)

Garden Quartz (Lodalite)

Silicon Dioxide (SiO2) with various inclusions

Yellow Chert

Sedimentary cryptocrystalline quartz (SiO2)

Fossiliferous Limestone

CaCO3 (principally Calcite or Aragonite)

Jasper containing fossilized inclusions

Silicon Dioxide (SiO2) with trace impurities and biogenic inclusions

Quartz / Iron-Stained Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions/staining

Ferruginous Quartz (Iron-Stained Quartz)

Quartz (Silicon Dioxide) with Iron Oxide inclusions (SiO2 + Fe2O3)

Green Jasper (with Quartz veining)

Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Gold-bearing Quartz

Lode Gold in Silicon Dioxide (SiO2)

Larimar

Pectolite (a blue variety of Pectolite)

Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)

SiO2 with TiO2 inclusions (Quartz with Rutile)

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz River Cobble

Silicon Dioxide (SiO2)

Gabbro

Gabbro (mafic intrusive igneous rock)

Moonstone

Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.

Pink Botswana Agate

Silicon Dioxide (SiO₂), a cryptocrystalline variety of Quartz and Chalcedony

Chert

Chert (microcrystalline quartz, SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Green Quartz (Prasiolite/Adventurine/Jasper)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Tan/Brown variety)

Chert (Silicon Dioxide, SiO2)

Chert (Tan/Grey variety)

Silicon Dioxide (SiO2)

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.