Mineral Group

Magnetite / Iron Ore

Magnetite (Fe3O4)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

Rough Diamond

Diamond (pure Carbon, C)

Druzy Quartz Geode (Vug)

Silicon Dioxide (SiO2)

Amber

Succinite (Resin C10H16O)

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Yellow Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Barite (Desert Rose or Cockscomb variety)

Barium Sulfate (BaSO4)

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Limonite (Ironstone Concretion)

Limonite (Hydrous ferric oxide mixture, FeO(OH)·nH2O)

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)

Quartz (Tumbled/Polished Pebble)

Silicon Dioxide (SiO2)

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Feldspar (Orthoclase)

Potassium Feldspar (KAlSi3O8)

Clear Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Jet

Lignite (Anthracite-grade compact coal)

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Geode (Water-worn)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)