Mineral, Specifically A Rock Fragment

Olivine in Basalt (Peridotite Xenolith)

Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt

Sulfide Ore (likely Galena and Sphalerite in Quartz)

Lead-Zinc Ore (PbS and ZnS)

Basalt with Quartz/Calcite Vein

Basalt (Mafic Volcanic Rock with secondary mineralization)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Granite

Phaneritic Felsic Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Mahogany Obsidian Arrowhead

Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Bivalve Fossil)

Calcium Carbonate (CaCO3) with Bivalvia fossil

Chert (Flint variety)

Chert (SiO2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Peridot in Basalt

Olivine ((Mg, Fe)2SiO4) in Basalt

Rose Quartz

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

Quartz (Milky/Yellowish variety)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Dyed Agate

Silicon Dioxide (SiO2)

Green Jade (specifically Nephrite)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Chert (specifically Jasper or Flint)

Cryptocrystalline Quartz (SiO2)

Chert (specifically Gray Chert)

Silicon Dioxide (SiO2)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Magnetite

Magnetite (Fe3O4)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Amygdaloidal Basalt with Epidote

Vesicular Basalt with secondary Epidote/Quartz mineral infill

Quartz Druzy Geode

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite (Pink/Red)

Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)

Limonite Concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Coarse-grained Granite

Phaneritic Granite (contains Quartz, Feldspar, and Mica)

Amethyst Geodes

Silicon Dioxide (Quartz with Iron impurities), SiO2

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Copper-bearing Quartz (likely Chrysocolla or Malachite staining)

Cuprite, Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) or Malachite staining on Quartz/Host Rock

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chalcedony

Cryptocrystalline Quartz (SiO2)

White Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Basalt with Amygdules

Amygdaloidal Basalt

Diamond

Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.

Turquoise in Matrix

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