Mineral Composite

Chrysotile Asbestos

Chrysotile (Mg3Si2O5(OH)4)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Gneiss (specifically Banded Gneiss)

Gneiss

Sandstone

Sedimentary Rock (Quartz Sandstone)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Botryoidal Hematite

Iron(III) oxide (Fe2O3)

Vanadinite

Lead Chlorovanadate, Pb5(VO4)3Cl

Quartz on Schist

Silicon Dioxide (SiO2) on Foliated Metamorphic Rock

Unidentified polished mineral specimen

Indeterminate; likely a pale feldspar or quartz-bearing material

Red garnet crystal cluster

Most likely almandine garnet, Fe₃Al₂(SiO₄)₃; exact species cannot be confirmed from the image alone.

Rounded granite pebble

Granite, a quartz–feldspar–mica plutonic rock

Jasper Beads (Polished)

Silicon Dioxide (SiO2)

Fluorite (Rainbow, Purple-Blue Tumbled)

Calcium Fluoride (CaF2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Mica Schist

Schist

Schist

Schist

Granite Pebble

Phaneritic intrusive igneous rock

Limonite (Ironstone)

Limonite (FeO(OH)·nH2O)

Cowrie shell

Marine gastropod shell; likely a cowrie (family Cypraeidae), species not identifiable from the image

Sea Snail Shell (Top Shell)

Trochidae family (Calcium Carbonate, CaCO3)

Dark, coarse-grained rock fragment (possibly amphibolite or gabbro)

Uncertain from the photo; likely amphibolite (hornblende-rich metamorphic rock) or a mafic igneous rock such as gabbro

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Polished pink feldspar-rich rock, possibly unakite

Likely unakite (epidote, pink potassium feldspar, and quartz); identification is uncertain from the photo

Schist

Mica Schist

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Tumbled Mixed Gemstones and Rocks

Various mineral species including quartz (SiO2) and silicate minerals

Sandstone and Conglomerate pebbles

Sedimentary clastic rock

Likely serpentinite (serpentine-rich rock)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Granite

Intrusive igneous felsic rock

Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Weathered copper-bearing rock, possibly chrysocolla-bearing quartz or host rock

Indeterminate from the photo; possible chrysocolla (hydrated copper silicate) with quartz or other host minerals

Milky quartz cluster

Quartz, silicon dioxide (SiO₂)

Yellow iron-oxide-rich mineral/rock fragment

Likely limonite/goethite (hydrated iron oxides; commonly approximated as FeO(OH)·nH₂O)

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Gneiss

Gneiss (Metamorphic rock)

Granite

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Shale

Shale (clastic sedimentary rock)

Mixed rock and mineral collection

Unidentified assortment of geological specimens; individual species cannot be determined from the image