Mixed (Predominantly Sedimentary And Igneous)

Pyrite in Quartz

FeS2 (Iron Pyrite) with SiO2 (Quartz)

Halite

Halite (Sodium Chloride, NaCl)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Bumblebee Jasper

Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)

Mixed beach gravel and cobbles

Polylithic alluvial or littoral clasts, including quartz, quartzite, chert, limestone, sandstone, and flint

Pink Granite

Phaneritic Plutonic Felsic Rock (K-feldspar rich)

Tumbled yellow-brown jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Mixed Gemstones and Minerals

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

Carnelian and Mixed Agates

Cryptocrystalline Quartz (SiO2 with Iron Oxide impurities)

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Tumbled jasper or chalcedony pebble

Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining

Granite and Mixed Landscape Gravel

Plutonic Igneous Rock / Weathered Alluvium

Sapphire

Corundum (Al2O3)

Polished agate or jasper cabochon

Cryptocrystalline quartz, SiO₂, possibly iron-rich jasper inclusions

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Conglomerate

Conglomerate (Sedimentary Clastic Rock)

Granitic Sand

Detrital sediment (predominantly Quartz, Feldspar, and Mica)

Garnet

Group of silicate minerals (e.g., Almandine: Fe3Al2(SiO4)3)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Blue Topaz (Cut Gemstone)

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Epidote in Granite Gneiss

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

Tumbled granite or granitic gneiss pebble

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

Granite

Granite; primarily quartz, alkali feldspar, plagioclase, and biotite/hornblende

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Leopard Skin Jasper

Silicon Dioxide (SiO2) with impurities

Chrysocolla

Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)

Rounded gray stone, likely weathered chert or quartz-rich river pebble

Chert (microcrystalline SiO₂), tentative

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Fuchsite Schist

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)

Silicon Dioxide (SiO2) with various inclusions

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Sandstone and Mixed Rock Assemblage

Clastic Sedimentary Rock / Quartz Arenite

Conglomerate

Conglomerate (clastic sedimentary rock)

Polished carnelian agate

Microcrystalline quartz (SiO₂), chalcedony with iron-oxide coloration

Mixed pebble collection, including likely flint, quartzite, and fossil material

Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil

Red Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Granite

Intrusive Igneous Rock

Fossiliferous Limestone

Limestone (CaCO3 with Limonite/Goethite staining)

Green Calcite

Calcium Carbonate (CaCO3)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Pink Granite

Granite (Felsic Plutonic Igneous Rock)