Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Tumbled banded stone, likely gneiss or granite

Quartz–feldspar rock, possibly banded gneiss; exact identification requires testing

Serpentine (likely polished/tumbled)

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile Mg₃Si₂O₅(OH)₄

Quartz-rich feldspar rock, possibly pegmatitic granite

Granite or granitic pegmatite; mainly quartz (SiO₂) and feldspar, with possible mica

Graphite

Graphite (Carbon, C)

Mixed rock collection

Labeled specimens appear to include iron-rich rock, schist, basalt, serpentinite, and shale

Quartz Vein in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Mixed river-worn rock collection

Uncertain; likely quartzite, sandstone, basalt, and weathered granite or gneiss

Granite

Intrusive Igneous Rock

Quartz with Inclusions

Silicon Dioxide (SiO2)

Granite

Coarse-grained granitic rock, primarily quartz, alkali feldspar, plagioclase, and dark biotite/amphibole

Quartz-rich granitic cobble

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

Polished blue-gray mineral specimen, likely galena-bearing ore

Galena (PbS), possibly mixed with quartz/calcite and secondary copper minerals

Milky quartz

Quartz, silicon dioxide (SiO₂)

Mixed polished gemstones and minerals

Likely agate/chalcedony (SiO₂), quartz, jasper, and possibly aventurine or obsidian; exact identification requires individual testing.

Granite

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

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)

Granodiorite (Weathered)

Granodiorite

Yellow Ochre (Limonite)

Limonite (FeO(OH)qnH2O)

Weathered granite (likely biotite granite)

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

Magnetite-rich black sand

Magnetite (Fe₃O₄), likely mixed with other heavy minerals

Quartz pebble

Silicon dioxide (SiO2)

Sodalite and Calcite

Na8(Al6Si6O24)Cl2 (Sodalite) and CaCO3 (Calcite)

Venetian Gold Granite

Phaneritic Felsic Igneous Rock (Granite)

Tumbled dark green stone, likely greenstone/serpentinite

Serpentinite (serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄), possibly chlorite-rich greenstone

Pebble with dark mineral inclusion

Likely granitic or gneissic quartz–feldspar pebble with a mafic inclusion; exact identification requires testing

Gravel and Sand Aggregate

Unconsolidated Clastic Sediment

Mixed rough mineral specimens, likely calcite with prehnite/zeolite

Calcite (CaCO₃), with probable prehnite (Ca₂Al₂Si₃O₁₀(OH)₂) and/or zeolite-group minerals

Granite Pebble

Intrusive Igneous Rock (Felsic to Intermediate)

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Likely granite

Granite, a coarse-grained intrusive igneous rock composed mainly of quartz, feldspar, and mica

Tumbled pink granite

Granite, composed mainly of quartz, potassium feldspar, plagioclase, and dark mica or amphibole

Garnet

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

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained or included in a mixed rock; exact identification is uncertain from the image

Epidote in Matrix (Unakite-like Rock Fragment)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) / Altered Metamorphic Pebble

Pink granite

Coarse-grained granitic rock, chiefly orthoclase microcline feldspar, quartz, and dark biotite/amphibole

Pegmatite with Lepidolite and Feldspar

Pegmatite (containing K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 and KAlSi3O8)

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Eudialyte

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

Sandstone with Desert Varnish

Arenite with Ferromanganese patina

Gravel or Crushed Stone

Fragmented Aggregate Stone