Mineral (Or Mineraloid If Microcrystalline)

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Seashell Fragment (Aragonite/Calcite)

Calcium Carbonate (CaCO3) - Shell fragment

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Moonstone (specifically White Moonstone or Girasol Quartz)

Potassium aluminum silicate (KAlSi3O8)

Amethyst (Quartz variety)

Silicon Dioxide (SiO2) with iron impurities

Chrysocolla on Matrix

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 + varied clasts)

Chrysocolla

Chrysocolla - (Cu,Al)2H2Si2O5(OH)4·nH2O

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

White Calcite

Calcium Carbonate (CaCO3)

Smoky Quartz

Silicon Dioxide (SiO2)

Banded Calcite (known as Mexican Onyx or Calcite Alabaster)

Calcium Carbonate (CaCO3)

Siltstone with Weathering Rind

Siltstone (composed of microscopic quartz and clay minerals)

Amethyst (Tumbled Chips)

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

Pyrite

Iron Sulfide (FeS2)

Smoky Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (SiO2 based)

Amber

Succinite (a fossilized organic resin)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Petrified Wood (Jet or Coalified Wood appearance)

Silicified wood (principally SiO2) or Carbonized Wood

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Sandstone (Water-worn Pebble)

Clastic sedimentary rock (primarily SiO2)

Rose Quartz

Silicon dioxide (SiO2)

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Wishing Stone

Greenschist or Basalt with Quartz/Calcite Vein

Porphyry (likely Porphyritic Andesite or Basalt)

Porphyritic Igneous Rock

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Beryl (Emerald Variety)

Beryllium aluminum silicate (Be3Al2Si6O18)

Smoky Quartz

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Stiped Slate Beach Pebble

Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)

Ironstone Concretion (Moqui Marble)

Iron Oxide Concretion (Goethite and Hematite around a Sandstone core)

Botryoidal Quartz / Calcite Geode crust

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Beryl (likely Aquamarine or Green Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Milky Quartz (Water-worn Pebble)

Quartz (Silicon Dioxide) - SiO2

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives