Mixed: Igneous And Sedimentary

River Cobbles (Basalt, Quartzite, and Sandstone mix)

Fluvial detritus (primarily SiO2, Plagioclase, and Pyroxene mix)

Granite or Granitic Gneiss

Granitoid / Gneiss

Mixed Mineral Collection

Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

River Pebbles and Quartz

Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Arkosic Sandstone (or Conglomeritic Sandstone fragment)

Arkose (rich in feldspar)

Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Gravel or Crushed Stone

Fragmented Aggregate Stone

Mixed River Pebbles

Clastic Sedimentary Alluvial Deposit / Polymictic Conglomerate Clasts

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion

Migmatite

Migmatite (Mixed Rock)

Quartz with Mica inclusions (Pegmatite)

Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Granite or Pegmatite with Quartz and Feldspar

Granitoid

Concrete fragment with Aggregate

Anthropogenic Concrete with Calcarious and Siliceous Aggregate

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)

Pink Granite

Granite (Felsic Plutonic Rock)

Smoky Quartz and Orthoclase Feldspar

Granitic Pegmatite (SiO2 + KAlSi3O8)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Migmatite

Migmatite (Mixed metamorphic-igneous rock)

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Granite Pebble

Granite (composed of Quartz, Feldspar, and Mica)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Caribbean Calcite

Calcite (CaCO3) with Aragonite (CaCO3)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

Sandstone (lithic wake/graywacke variety)

Arenite/Greywacke (SiO2 with lithic fragments)

General river rock or weathered cobble

Mixed rock composition

Pink Granite

Phaneritic intrusive igneous rock (Granite)

Pink Granite (Gneissic Granite)

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

Granodiorite

Granodiorite (containing Plagioclase, Quartz, K-Feldspar, and Hornblende or Biotite)

Pink Granite

Granite (rich in Potassium Feldspar/Orthoclase)

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Pink Granite

Phaneritic Felsic Igneous Rock