Mixed (Predominantly Sedimentary And Igneous)

Small polished gemstone chips, likely mixed quartz varieties

Quartz (SiO₂), possibly including smoky quartz and other varieties; exact identification is uncertain from the image

Conglomerate

Conglomerate

Schist

Chlorite/Mica Schist

Mahogany Obsidian

Volcanic Glass (SiO2 with Hematite/Magnetite inclusions)

Granite

Intrusive Igneous Rock

Jasper with Quartz

Silicon Dioxide (SiO2) - Chalcedony variety

Banded Chert / Jasper

Silicon Dioxide (SiO2)

Amazonite with Smoky Quartz and Feldspar

Microcline (KAlSi3O8) with Quartz (SiO2)

Conglomerate

Polymictic conglomerate; clast-bearing sedimentary rock cemented by silica, calcite, or iron oxides

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.)

Kaolin (China Clay)

Kaolinite [Al2Si2O5(OH)4]

Crushed Stone (Gravel/Aggregates)

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

Blue Chalcedony

Silicon Dioxide (SiO2)

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Granite or granitic gneiss boulders

Quartz–feldspar–mica granitoid; possibly banded gneiss

Quartz-rich granitic cobble

Granite or granitic gneiss; primarily quartz, feldspar, and mica

Pink granite

Felsic intrusive igneous rock; chiefly quartz, alkali feldspar, plagioclase, and dark biotite/hornblende

Weathered granite (likely biotite granite)

Granite; primarily quartz (SiO₂), feldspar, and biotite mica

Quartz-rich granitic fragment

Granite or granitic pegmatite; chiefly quartz (SiO₂), feldspar, and minor mica

Pink Granite

Intrusive Igneous Rock (high K-feldspar content)

Tumbled white quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Granite

Coarse-grained felsic plutonic rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende

Granite

Granitic plutonic rock, chiefly quartz, alkali feldspar, plagioclase, and mica/amphibole

Tumbled pink granite

Granite, primarily quartz, feldspar, and mica; likely pink alkali-feldspar granite

Granite Pebble

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

Granite Pebble

Intrusive Igneous Rock (Quartz, Feldspar, Mica)

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)

Mixed small pebbles and mineral grains

Unidentified detrital sediment; likely quartz-, feldspar-, and lithic fragments

Asphalt aggregate pavement

Bituminous asphalt concrete containing crushed stone aggregate

Asphalt Conglomerate

Artificial Bituminous Conglomerate

Tumbled beige stone, possibly quartz or calcite

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Garnet

Garnet-group silicate, likely almandine–spessartine; general formula X₃Y₂(SiO₄)₃

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

Pegmatite

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Polished carnelian jasper / brecciated jasper

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

Conglomerate

Conglomerate (clastic sedimentary rock)

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Fancy Jasper

Silicon Dioxide (SiO2) with iron and organic inclusions

Yellow Chalcedony (likely carnelian or yellow agate)

Silicon Dioxide (SiO₂)

Red Granite

Granite (Felsic intrusive igneous rock)