Mineralological Specimen

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

K2 Stone (or K2 Jasper)

Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)

Kambaba Jasper

Stromatolite / Fossilized Algae (Rhyolitic structure)

Labradorite

(Ca, Na)(Al, Si)4O8

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Clear Quartz

Silicon Dioxide (SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Hypersthene

Enstatite (Hypersthene variety), (Mg,Fe)SiO3

Herkimer Diamond

Quartz (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz (with potential inclusion of feldspar)

Silicon Dioxide (SiO2)

Dendritic Agate (River Pebble)

Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Septarian Nodule (Dragon Stone)

Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)

Green Moss Agate

Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite

Dendritic Agate (specifically Orange/Tumbled)

Silicon Dioxide (SiO2) with Oxide Inclusions

Rose Quartz

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

Obsidian

Obsidian (Volcanic Glass)

Labradorite (Dark or Black variety)

Labradorite (member of Plagioclase Feldspar group), (Na,Ca)(Si,Al)4O8

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Bumblebee Jasper

Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)

Clear Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Jasper Breccia

Silicon Dioxide (SiO2) with impurities

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Amethyst (Quartz)

Silicon Dioxide (SiO2) with Iron impurities

Amazonite

Tectosilicate (variety of Microcline), K(AlSi3O8)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Ocean Jasper

Orbicular Jasper (varietal of SiO2 with impurities)