Sedimentary And Metamorphic Minerals

Yellow Calcite

Calcium Carbonate (CaCO3)

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)

Silicon Dioxide (SiO2) with various inclusions

Specular Hematite

Hematite (Fe2O3)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Chert (Limestone-based)

Silicon dioxide (SiO2)

Chert / Flint

Chert (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with high iron inclusion

Chert (Nodule)

Chert (composition: SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2) with Iron Oxide impurities

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (specifically Jasper/Carnelian variety)

Microcrystalline quartz (SiO2)

Coquina

Bioclastic Limestone (CaCO3)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Green variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Petrified Wood

Silicified Wood (primarily SiO2)

Granitoid (Granite/Gneiss)

Granitoid silicate rock, primarily quartz and feldspar

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Galena

Lead(II) sulfide (PbS)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Gastropod Steinkern (Internal Mold Fossil)

Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix

Limonite (also known as Yellow Ochre or Brown Hematite)

Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)

Turquoise

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

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone

Limestone (Ocherous)

Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)

Shale

Fissile mudstone (rich in clay minerals and quartz)

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Ironstone Nodules / Siderite Concretion

Siderite (FeCO3) / Ferruginous Septarian Concretion

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Moqui Marble (Shaman Stone)

Ironstone Concretion (Fe2O3 with a sandstone core)

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)