Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Mixed rounded fieldstones, likely granite and gneiss

Granite (quartz–feldspar–mica) and gneiss; exact identification is uncertain from the photograph

Dalmatian Jasper

Microcrystalline Quartz with Arfvedsonite/Tourmaline inclusions

Lapis Lazuli

Lapis Lazuli (Rock containing lazurite, calcite, and pyrite)

Black granite (likely polished gabbro or diabase)

Granitoid rock dominated by feldspar, quartz, and dark mafic minerals; exact identification requires testing

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Smoky Quartz with Feldspar

SiO2 (Quartz) with KAlSi3O8 (Feldspar)

Mixed rock and mineral collection

Mixed lithologies; likely quartz, feldspar, basalt, granite, chert, sandstone, and metamorphic rocks

Granite

Granite (Phaneritic intrusive igneous rock)

Bauxite (Iron-stained Chert / Ironstone Aggregate)

Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))

Kaolin (China Clay)

Kaolinite [Al2Si2O5(OH)4]

Yellow Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Mixed Gemstones and Minerals

Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)

Glacially transported granite and gneiss boulders

Granite (quartz–feldspar–mica); banded specimens likely gneiss

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Quartz with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)

Unakite

Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)

Epidosite

Epidosite (composed primarily of Epidote and Quartz)

Fancy Jasper

Silicon Dioxide (SiO2) with iron and organic inclusions

African Turquoise

African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)

Magnetite

Magnetite (Fe3O4)

Gravel or Pebble

Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)

Quartz

Silicon Dioxide (SiO2)

Tumbled granite or granitic gneiss pebble

Granite/granitic gneiss, chiefly quartz, feldspar, and dark biotite or amphibole

Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Peacock Ore

Bornite (Cu5FeS4)

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Unakite

Altered Granite (Epidotized Granite)

Pyrite in Quartz

FeS2 (Iron Pyrite) with SiO2 (Quartz)

Weathered iron-rich rock, possibly hematite-bearing breccia

Hematite (Fe₂O₃)-rich lithic fragment; exact host rock is uncertain from the image

General river rock or weathered cobble

Mixed rock composition

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Likely gray granite fragment

Granite, composed mainly of quartz, feldspar, and mica

Pink Granite

Phaneritic Plutonic Felsic Rock (K-feldspar rich)

Pink Granite (Gneissic Granite)

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Pink Granite

Phaneritic intrusive igneous rock with dominant Alkali Feldspar

Pegmatite

Igneous Pegmatite (Quartz, Feldspar, Micas)

Green Aventurine

SiO2