Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Schist

Lepidoblastic Mica Schist

Tufa (Vesicular Limestone)

Tufa (form of Calcium Carbonate, CaCO3)

Quartzite Pebble

Quartzite (mostly SiO2)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Sandstone

Arenite (primarily composed of SiO2 - Silicon Dioxide)

Quartzite

Quartzite (primarily SiO2)

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)

Petrified Wood

Silicon Dioxide (SiO2) permineralized organic matter

Granite (Weathered)

Grano-diorite / Granite (SiO2 rich intrusive rock)

Quartzite

Quartzite (primarily SiO2)

Chert (Holey Stone)

Microcrystalline Quartz (SiO2)

Quartzite

Quartzite (SiO2)

Black Onyx

Silicon Dioxide (SiO2)

Fluorite (likely)

Calcium Fluoride (CaF2)

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Granite

Granite (a plutonic igneous rock)

Granite

Granite (a common rock type, not a single mineral species)

Blue Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Petrified Wood

Silicified Wood (SiO2)

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Yellow Chert (River Stone/Pebble)

Chert (Cryptocrystalline Quartz, SiO2)

Pyrite

Iron Disulfide (FeS2)

Leopard Skin Jasper

Chalcedony (cryptocrystalline Quartz)

Carnelian

SiO2 (Silicon Dioxide) - Translucent Chalcedony

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Soapstone

Steatite (composed primarily of Talc, Mg3Si4O10(OH)2)

Orange Quartzite (River Pebble)

Quartzite (primarily SiO2)

Moss Agate

Silicon Dioxide with inclusions (SiO2 + impurities)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Yellow Ocher (Limonite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Petrified Wood

Silicified Wood (SiO2)

Chert / Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Turquoise

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

Aventurine (specifically Green Aventurine)

Silicon Dioxide (Quartz) with inclusions of Fuchsite; SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)