Mineral, Often A Rock Given Its Aggregate Nature

Grey Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Ferruginous Conglomerate

Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))

Milky Quartz

Silicon Dioxide (SiO2)

Pink Granite

Granite (Phaneritic intrusive igneous rock)

Basalt

Basalt (Mafic Aphanitic Igneous Rock)

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Dragon Blood Jasper (Epidote with Piedmontite or Quartz)

Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Sodium Iron Aluminum Borosilicate)

Gold Nugget

Native Gold (Au)

Basalt River Stone (Tumbled)

Basalt (Mafic Extrusive Igneous Rock)

Granite

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Scoria (Lava Rock)

Scoria (extrusive volcanic rock)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Black Tourmaline (Schorl)

Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Lepidolite (in Quartz Matrix)

Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO₂)

Hematite Nodules (Moqui Marbles style)

Iron Oxide (Fe2O3)

Gold Nugget

Native Gold (Au)

Basalt with Quartz Vein

Mafic Igneous Rock (SiO2 filling)

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Quartz Veined Basalt Pebble

Amygdaloidal Basalt with Quartz (SiO2) veining

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) within a resin matrix

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Malachite

Malachite (Copper Carbonate Hydroxide, Cu2CO3(OH)2)

Granite

Granite (Phaneritic igneous rock)

Porphyritic Basalt (Leopard Rock)

Porphyritic Mafic Volcanic Rock

Basalt

Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)

Basalt Pebble

Basalt (Aphanitic Mafic Volcanic Rock)