Metamorphic Or Sedimentary Depending On Local Grade

Anthracite Coal

Anthracite

Gneiss (likely granitic gneiss)

Foliated quartz–feldspar gneiss, commonly derived from granite

Blue Kyanite

Kyanite (Al2SiO5)

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Tumbled dark green beach pebble

Likely serpentinite or altered basalt; exact identification requires testing

Serpentine (likely antigorite-rich serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chromite, or talc

Gneiss

Gneiss (Metamorphic high-grade)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Slate

Slate; fine-grained foliated metamorphic rock, commonly derived from shale or mudstone

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz (Rose Quartz or Jasper variety)

Silicon Dioxide (SiO2)

Tumbled greenstone, likely serpentine or altered basalt

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; possibly chlorite/epidote-bearing mafic rock

Gneiss

Metamorphic Gneiss

Veined dark metamorphic rock, likely serpentinite

Serpentinite, predominantly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible quartz, calcite, and magnetite veins

River Cobble (Quartzite or Weathered Sandstone)

Arenite / Metasandstone (SiO2)

Citrine

Silicon dioxide (SiO2)

Serpentine-rich altered ultramafic rock

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite and carbonate

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

Gneiss (Granitic Gneiss)

Gneiss

Slate

Foliated Metamorphic Rock

Mookaite Jasper

Silicified radiolarian ooze (SiO2)

Garnet

Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Greenstone / altered basalt (probable)

Chlorite–epidote–actinolite aggregate; commonly metabasalt (greenstone)

Hornblende–biotite schist (probable)

Amphibole–mica schist; chiefly hornblende, biotite, quartz, and feldspar

Blue-gray metamorphic rock, likely slate or phyllite

Slate/phyllite; chiefly quartz, muscovite/illite, chlorite, and minor feldspar

Garnet in Schist (Polished Tower)

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Gneiss

High-grade Metamorphic Gneiss

Slate

Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)

Iron-stained quartz-rich rock, possibly weathered granite or quartzite

Uncertain from image; likely quartz (SiO₂) with feldspar and iron-oxide staining

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely partially translucent massive quartz

Sandstone (with cross-bedding)

Arenite (composed primarily of Quartz: SiO2)

Bauxite

Aluminium ore consisting largely of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH) and diaspore α-AlO(OH)

Gneiss

Gneiss (High-grade metamorphic rock)

Amphibolite

Amphibolite (rich in amphibole and plagioclase feldspar)

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)

Serpentinite (often containing Jadeite/Nephrite)

Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4

Fossil shell or shell fragment

Likely a calcareous bivalve or gastropod fragment; precise identification requires locality and microscopy

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Polished ruby-in-zoisite sphere (anyolite)

Ruby-bearing zoisite, commonly called anyolite; zoisite Ca₂Al₃(SiO₄)₃(OH) with corundum ruby Al₂O₃