Mineral (Man Modified)

Milky quartz pebble

Quartz (SiO₂)

Iron-stained quartz-rich rock

Likely quartz with iron-oxide staining (SiO₂ with goethite/limonite); exact identification is uncertain from the photo

Milky quartz with iron staining

Quartz (SiO₂), likely iron-oxide-stained vein quartz

Likely iron-rich concretion or weathered ironstone

Ironstone concretion, composed mainly of iron oxides/hydroxides (goethite and/or limonite) cementing sediment

Fossiliferous limestone, likely coral or shell-rich limestone

Biogenic calcite (CaCO₃), commonly limestone containing fossil coral or mollusks

Yellow calcite (rough specimen)

Calcite, CaCO₃

Limonite pseudo-concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Tumbled hematite-rich ironstone

Hematite (Fe₂O₃), likely mixed with magnetite and iron-bearing silicates

White druzy quartz pendant with a blue crystal accent

Quartz (SiO₂); the blue material is not identifiable from the image

Greenish altered rock, possibly serpentinite or chlorite-rich schist

Tentative: serpentine-group minerals, chiefly antigorite/lizardite, or chlorite–actinolite assemblage

Native gold-bearing rock (probable gold nugget/ore fragment)

Native gold, Au, associated with quartz and/or iron oxides

Tumbled greenstone (likely serpentine)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄

Howlite (polished/tumbled)

Howlite, Ca₂B₅SiO₉(OH)₅

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals (chrysotile, lizardite, antigorite), with olivine/pyroxene relics and possible magnetite

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Polished banded malachite

Malachite, Cu₂CO₃(OH)₂

Small brown mineral specimen, possibly mica-bearing rock

Unidentified from the image; exact mineral species cannot be determined at this scale

Small white quartz fragment

Quartz (silicon dioxide, SiO₂)

Green calcite (probable)

Calcite, calcium carbonate (CaCO₃)

Polished dendritic agate pebble

Chalcedony (microcrystalline SiO₂) with dark manganese- or iron-oxide dendrites

Metallic sulfide mineral fragment, likely bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂)

Limonite / Ironstone

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Unakite (likely)

Epidote–feldspar–quartz rock; unakite is altered granitic rock, commonly containing epidote, pink orthoclase, and quartz.

Fossilized Coral (Petoskey Stone or Rugose Coral)

Antophyllum (Hexagonaria) or Scleractinia (CaCO3)

Sandstone

Arenite (composed primarily of SiO2)

Orange calcite (likely honey/orange calcite)

Calcite, calcium carbonate (CaCO₃)

Quartz Druze

Silicon Dioxide (SiO2)

Weathered gray metamorphic rock, likely slate or phyllite

Foliated metapelite; commonly muscovite–quartz–chlorite, possibly with iron-oxide staining

Actinolite (likely fibrous amphibole)

Actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; possibly an actinolite–tremolite specimen

Limonite (Iron Ore)

Hydrated ferric oxide mixture (FeO(OH)·nH2O)

Granite (likely biotite granite)

Coarse-grained felsic plutonic rock: quartz + feldspar + biotite; approximate composition SiO₂-rich

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz cluster

Quartz (silicon dioxide, SiO₂)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Tumbled quartz-rich stone, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite if composed of interlocked quartz grains

Weathered granite

Granite, chiefly quartz and feldspar with dark mica or amphibole

Mica-bearing granite or pegmatite fragment

Quartz–feldspar rock with mica, likely muscovite; exact identification requires testing

Galena (lead ore)

Galena, PbS (lead sulfide)

Polished pink granite cobble

Granite, chiefly potassium feldspar, plagioclase, quartz, and biotite/hornblende

Apatite

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

Weathered iron-rich rock (possibly ironstone)

Likely ferruginous sandstone or ironstone; exact identification requires examination

Sodalite

Sodalite (Na8Al6Si6O24Cl2)