Mineral Within A Sedimentary Rock

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities), SiO2

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Mica Schist

Foliated Metamorphic Rock (Schist)

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Pyrite in Shale

Iron Sulfide (FeS2) in Argillaceous Shale

Gneiss

Gneiss (High-grade metamorphic rock)

Chert (Tan/Yellow variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Jasper (Chocolate or Brown Jasper)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Bivalve Fossil (Clam/Mollusk)

Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)

Chert (White-Tan variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline quartz (SiO2)

Ferruginous Sandstone Pebble

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)

Graphite Schist

C (Carbonaceous Schist)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Slate

Slate (Metamorphic Rock)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

Chert (specifically Jasper/Brown Chert)

Silicon Dioxide (SiO2)

Not a geological specimen

N/A (man-made object)

Chert (Nodule)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Chert (Nodular Chert)

Silicon Dioxide (SiO2)

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Chert (with Quartz veins)

Microcrystalline Quartz (SiO2)

Fossiliferous Rock (likely Dinosaur Fossil in Matrix)

Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper)

Chert (chemical sedimentary rock), Quartz (SiO2)

Chert (and/or Siltstone River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Quartz Variety)

Chert (Silicon Dioxide, SiO2)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Granite

Granite (Phaneritic Igneous Rock)

Red Aventurine

Aventurine Quartz (SiO2 + Hematite/Goethite)

Turquoise in Matrix

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

Chert (specifically Yellow or River Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)