Metamorphic, Likely Sedimentary With Quartz Veins

Pyrite

Iron Sulfide (FeS2)

Sandstone with trace fossil

Sandstone, possibly with Skolithos or similar trace fossil

Rose Quartz

Quartz (SiO2) with trace elements of titanium, iron, or manganese

Pyrite

Iron Sulfide (FeS2)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Quartz (Smoky/Grey Quartz Variant)

Silicon Dioxide (SiO2)

Epidote in Matrix (Dragon Stone variant)

Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))

Rose Quartz

Rose Quartz (SiO2)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Beryl (likely Aquamarine) in matrix

Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)

Amethyst (Quartz)

Silicon Dioxide (SiO2) with Iron impurities

Citrine Quartz

Silicon Dioxide (SiO2) - Ferric Iron impurities

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Quarzite or Massive Quartz vein)

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Epidote with Quartz and Feldspar

Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Eclogite

Eclogite (Omphacite + Pyrope)

Gneiss

Gneiss (High-grade metamorphic rock)

Rough Quartz (or Quartzite pebble)

Silicon Dioxide (SiO2)

Black Marble

Recrystallized Calcite (CaCO3)

Massive Cryptocrystalline Quartz (Chert/Chalcedony Pebble)

Silicon Dioxide (SiO2)

Unakite (bottom) and Sodalite (top)

Epidotized Granite (Unakite) and Sodium Aluminum Silicate Chloride (Sodalite)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO2)

White Quartz Pebble (with possible Quartz Geode cavity)

Silicon Dioxide (SiO2)

Mica (likely Muscovite)

Muscovite / KAl2(AlSi3O10)(OH)2

Pyrite

Pyrite (FeS2)

Greenschist with Quartz Veining

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)

Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Citrine

Silicon Dioxide (SiO2) with ferric iron impurities

Gold

Native Gold (Au)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Greenschist

Greenschist (comprising Actinolite, Chlorite, and Epidote)

White Marble (often sold as Caribbean Calcite or Pistachio Calcite in this form)

Recrystallized Calcite (CaCO3)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Marble

Recrystallized Calcite (CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert Pebble / Brachiopod Fossil Internal Mold

Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)