Mixed Rock Collection
Polylithic Geological Specimen Mix
sedimentary and igneous
Category
Mixed
Browse mixed specimens identified by the Rock Identifier community.
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Gravel and Sand Aggregate
Unconsolidated Clastic Sediment
sedimentary
Mixed Rock and Mineral Collection
Various geological specimens
igneous, sedimentary, and metamorphic
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Beach Pebbles and Quartz Aggregates
Quartz pebbles and biogenic fragments (SiO2, CaCO3)
sedimentary
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Granite or Granitic Gneiss
Granitoid / Gneiss
Igneous / Metamorphic
Red Jasper with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Carved Stone Turtle
Mixed stone carving
carved stone
Chakra Crystal Bracelet
Mixed Mineral Assortment
gemstone
General river rock or weathered cobble
Mixed rock composition
igneous/metamorphic
Migmatite
Migmatite (Mixed Rock)
metamorphic
Polished agate or jasper cabochon
Cryptocrystalline quartz, SiO₂, possibly iron-rich jasper inclusions
gemstone
Dark gray weathered pebble, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine or iron oxides
igneous
Crushed Stone / Gravel
Aggregate (mixed lithology)
sedimentary
Gravel and Sediment Sample
Mixed clastic sediment
sedimentary
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Beach Pebbles and Jasper
Quartz / Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Glacially transported granite and gneiss boulders
Granite (quartz–feldspar–mica); banded specimens likely gneiss
igneous and metamorphic
Sodalite
Na8Al6Si6O24Cl2
mineral
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Asphalt (Bituminous Rock)
Natural bitumen or Bituminous limestone/sandstone
sedimentary
Granite or Pegmatite with Quartz and Feldspar
Granitoid
igneous
Smoky Quartz with Feldspar
SiO2 (Quartz) with KAlSi3O8 (Feldspar)
mineral
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Asphalt
Asphalt concrete
sedimentary
Tiffany Stone
Fluorite-bearing Opalized Breccia
Rock/Mineralized Nodule
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Crushed Granite and Quartz Gravel
Composite Igneous and Silicate Rock Aggregate
igneous
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Unakite (or Epidote-rich Granite)
Unakite (Metamorphosed Granite consisting of Epidote, Orthoclase, and Quartz)
metamorphic
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
mineral-based composite
Yellow Ochre (Limonite)
Limonite (FeO(OH)qnH2O)
sedimentary
Dragon Blood Jasper
Epidote with Red Jasper (Quartz-rich aggregate)
sedimentary
Puddingstone
Conglomerate
Sedimentary
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)
igneous