Sedimentary And Igneous (Mixed)

Pink Granite

Phaneritic Felsic Igneous Rock

Concrete rubble

Anthropogenic conglomerate

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

River Pebble

Polished Quartzite or Mixed Lithology

Mahogany Obsidian

Volcanic Glass (SiO2 with Hematite/Magnetite inclusions)

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)

Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates

Mookaite Jasper

Silicified Radiolarite (SiO2)

Gravel or Pebble

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

Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)

Granite / Quartz-Feldspar-Mica Aggregate

Red Granite

Granite (Felsic Plutonic Rock)

Breccia

Breccia (Clastic sedimentary rock)

Granite Pebble

Intrusive Igneous Rock (Quartz, Feldspar, Mica)

Granite Pebble

Granite (composed primarily of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Amphibole)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Granodiorite (Weathered)

Granodiorite

Granodiorite (containing Biotite and Quartz)

Granodiorite (Plagioclase-rich phaneritic intrusive rock)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Mixed rock and mineral collection

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

Conglomerate

Conglomeratic Sandstone

Glacial Cobbles (predominantly Granite and Gneiss)

Mixed lithologies (Quartz, Feldspar, Mica assemblage)

Granite Pebble

Granite

Granite Pebble

Intrusive Igneous Rock (Granite)

Greenstone / Diorite

Intermediate plutonic igneous rock

Yellow Jasper

Jasper (Silicon Dioxide with Iron Hydroxide impurities, SiO2 + FeO(OH))

Gravel and Pavement Aggregates

Unconsolidated rock fragments / detrital sediments

Mixed collection of common river stones

Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material

Granite

Intrusive Igneous Rock

Amazonite with Smoky Quartz and Feldspar

Microcline (KAlSi3O8) with Quartz (SiO2)

Pink Granite

Intrusive Igneous Rock (high K-feldspar content)

Conglomerate

Conglomerate

Polished carnelian jasper / brecciated jasper

Microcrystalline quartz (SiO₂), chalcedony with iron-oxide pigments and opaque jasper fragments

Granite Pebble

Intrusive Igneous Rock (Felsic to Intermediate)

Jasp-Agate

Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions

Conglomerate

Conglomerate

Eudialyte

Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)

Kaolin (China Clay)

Kaolinite [Al2Si2O5(OH)4]

Granite

Felsic intrusive igneous rock

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Pegmatite (Granitic Pegmatite with Quartz, Mica, and Tourmaline/Biotite)

Pegmatite

Unidentified coarse-grained rock fragments

Likely granite or granitic rock; exact identification is uncertain from the photograph

Feldspar (Granite Pegmatite matrix)

Potassium Feldspar (KAlSi3O8) / Quartz Mixture