Mineralized Fossil

Quartzite

Quartzite (Primary mineral: SiO2)

Blue Lace Agate

Chalcedony (SiO2) with trace minerals

Abalone Shell (Nacre)

Aragonite (CaCO3) - Biogenic Mineral

Jasper

Jasper (Silicate mineral, SiO2)

Quartzite

Quartzite (Primary mineral: SiO2)

Aventurine (Tan/Cream colored)

Quartz (SiO2) with mineral inclusions

Quartzite

Quartzite (Primary mineral: SiO2)

Quartzite

Quartzite (Primary mineral: SiO2)

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Red Sandstone

Arenite (Ferruginous Sandstone)

Jasper containing epidote (Unakite-like)

Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Red Sandstone

Arenite with Iron Oxide (Hematite) cement

Yellow Jasper

Chalcedony (Silicon Dioxide with Iron inclusions), SiO2

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

Turquoise

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

Basalt with Quartz/Zeolite Inclusions

Porphyritic Basalt (SiO2 with Aluminosilicates)

Red Sandstone Pebble

Arenite with Hematite (Fe2O3) cement

Malachite

Copper Carbonate Hydroxide [Cu2CO3(OH)2]

Red Sandstone

Arenite (with Iron Oxide pigmentation)

Chatoyant Quartz (Cat's Eye Quartz)

Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile

Basalt with Epidote (Flowerstone-like texture)

Amygdaloidal Basalt (silicate mineral inclusions)

Azurite-Malachite (often called Azerite Malachite or Azurmalachite)

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)

Quartzite with Dark Mineral Inclusions

Quartzite (primarily SiO2) with accessory minerals

Milky Quartz with Chlorite inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals

Hematite (beads)

Hematite (Fe₂O₃)

Geode (Unopened)

Crystalline Quartz or Chalcedony filled Geode (SiO2)

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Quartz Pebble

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Quartz Pebble (with Iron Staining)

Crystalline Silicon Dioxide (SiO2)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Macro crystalline variety)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Quartz Pebble

Silicon Dioxide (SiO2)