Metamorphic Or Igneous With Mineral Inclusion

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Epidote

Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Green Aventurine (Propably a tumbled variety)

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Schist

Mica Schist (primarily Muscovite and Biotite)

White Quartz (Mushroom Carving)

Quartz (Silicon Dioxide - SiO2)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Tiger's Eye (Inlaid in a band)

SiO2 (Silicon Dioxide with Crocidolite inclusions)

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz Pebble (with Mica or Iron staining)

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Schist

Mica Schist

Granitic Pegmatite

Pegmatitic Granite

Milky Quartz

Silicon Dioxide (SiO2)

Granitic Pegmatite

Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)

Beryl (Emerald Variety)

Beryllium aluminum silicate (Be3Al2(SiO3)6) with chromium/vanadium traces

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Pyrite

Iron Pyrite (FeS₂)

Rose Quartz

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

Red Jasper (Skull Carving)

Jasper (Silicon Dioxide, SiO2 plus Iron Oxide inclusions)

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Quartz / Quartzite

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Orange Calcite

Calcium Carbonate (CaCO3)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Rough Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

White Quartz

Silicon Dioxide (SiO2)

Chert (Jasper nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Orange Calcite point

Calcite (Calcium Carbonate, CaCO3)

Citrine

Silicon Dioxide (SiO2)

Basalt with Quartz/Calcite matrix

Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix