Mineral On Sedimentary Rock

Smoky Quartz

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3) with Chromium traces

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)

Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)

SiO₂ (silicon dioxide)

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Sandstone) with Iron Oxide (Fe2O3)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Chert / Quartz Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Mookaite Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Chert (with Liesegang Banding)

Microcrystalline quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Grey Agate (Tumbled)

Silicon Dioxide (SiO2)

Quartz (Variety of Rough Mineral Specimens)

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Limestone (Porous/Travertine variant)

Sedimentary Calcium Carbonate (CaCO3)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Yellow Jasper (Iron-stained Quartz)

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Quartz with Hematite Staining

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)

Granite

Granite (Felsic Plutonic Rock)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Orange Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

Vesicular Basalt (Iron-Stained)

Mafic Volcanic Rock (Basalt)

Favosites Fossil (Honeycomb Coral)

Favosites sp. (Extinct genus of tabulate coral)

Turquoise

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz (with Iron Oxide staining)

Silicon Dioxide (SiO2)

Porphyry (likely Porphyritic Andesite or Basalt)

Porphyritic Igneous Rock