Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Fluorite (likely Green Fluorite variant)

Calcium Fluoride (CaF2)

Quartz Geode

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

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))

Basalt with Plagioclase Microphenocrysts

Amygdaloidal or Porphyritic Basalt

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2

Fluorite

Calcium Fluoride (CaF2)

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions

Jasper (Mookaite variety likely)

Silicon Dioxide (SiO2) with iron oxide inclusions

Grass (Organic Matter/Soil)

Poaceae (family of monocotyledonous flowering plants)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

Granite Pebble

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)

Yellow Chalcedony

Silicon Dioxide (SiO2)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Quartz (likely milky quartz or a stained variety)

Silicon Dioxide (SiO₂)

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Not a rock, mineral, or geological specimen

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Pyrite

Iron Disulfide (FeS2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Chert (Lightly weathered variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Turquoise color-bead and Hematite necklace

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Rough Quartz (with potential Host Rock)

Silicon Dioxide (SiO2)

Turquoise and Spiny Oyster (Heishi style beads)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Spondylus (Spiny Oyster shell)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions/staining (Limonite/Hematite)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Chert Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Druzy Quartz on Milky Quartz

Silicon Dioxide (SiO2)

Turquoise, Pearl, and Coral Necklace

CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite and Calcite inclusions

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Chert Pebble (Jasper/Quartz variety)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Black Kyanite

Kyanite (Al2SiO5) with carbonaceous inclusions