Mixed: Igneous And Sedimentary

Mixed rounded river pebbles, likely basalt and granite

Basalt (fine-grained mafic rock) and granite/granitoid (quartz–feldspar rock)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Chert (with Epidote/Quartz veining)

Cryptocrystalline silica (SiO2) with Epidote/Quartz inclusions

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

Granite (Pink/Red Granite)

Phaneritic Felsic Igneous Rock

Concrete with Aggregate

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

Agate

Silicon dioxide (Chalcedony), SiO2

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Agate

Silicon dioxide (Chalcedony), SiO2

Agate

Silicon Dioxide (Chalcedony), SiO2

Petrified Wood and Mixed Rocks

Silicified Wood (SiO2)

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Polished/tumbled metallic sulfide specimen, likely pyrite

Pyrite (FeS₂), possibly mixed with chalcopyrite or other sulfides

Mixed tumbled stone collection

Assorted minerals, likely including quartz, jasper, agate, and possibly obsidian or hematite

River Rock (Glacial Cobbles)

Fluvial Alluvium (Mixed lithology including Quartzite, Basalt, and Granite)

Graphite

Graphite (Carbon, C)

Yellow Chalcedony (likely Carnelian or Agate)

Silicon dioxide (SiO2)

Sodalite

Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (zirconium dioxide, ZrO₂); identity is visual and not definitive

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Chakra Stone Bracelet

Mixed Mineral Assembly (Scoria, Amethyst, Lapis Lazuli, Turquoise/Howlite, Impression Jasper, Tiger's Eye, Carnelian, Red Jasper)

Ruby in Zoisite

Anyolite (Ruby in Zoisite)

Mixed rounded river gravel

Polymictic alluvial gravel; likely mixtures of quartzite, granite, basalt, sandstone, and other silicate rocks

Mixed River Pebbles and Jasper

Siliciclastic sediment and microcrystalline quartz

River Cobble (Mixed Lithology)

Clastic Sedimentary Rock (Silicified Siltstone or Wacke)

Conglomerate (Greenstone/Pebble Conglomerate)

Polymictic Conglomerate

Mixed river gravel, prominently iron-stained chert/jasper

Microcrystalline quartz (SiO₂), chiefly chert/jasper with iron-oxide staining; mixed clasts may include quartzite and other silicates

Jasper and Mixed River Pebbles

Microcrystalline Quartz (Chalcedony / Jasper)

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Agate

Silicon Dioxide (Quartz), SiO2

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

Granite Cobble

Phaneritic Plutonic Felsic Rock

Pyrite-bearing sulfide specimen

Pyrite (FeS₂), possibly mixed with chalcopyrite or other iron sulfides

Quartz-rich rock fragments, likely granite or gneiss

Granite/gneiss assemblage; chiefly quartz (SiO₂), feldspar, and mica

Mixed Gemstone Beaded Jewelry

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

Iron-rich concretion (probable limonite/goethite concretion)

Hydrated iron oxides, chiefly limonite (FeO(OH)·nH₂O) and goethite (FeO(OH))

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)