Mineraloid (Anthropogenic)

Malachite-bearing copper ore

Malachite (Cu₂CO₃(OH)₂), likely mixed with chrysocolla, limonite, or native copper minerals

Iron-rich sandstone (ferruginous sandstone)

Quartz-rich sandstone cemented or stained by iron oxides, commonly hematite (Fe₂O₃) and goethite (FeO(OH))

Amphibolite (likely)

Amphibolite, composed mainly of hornblende-group amphibole and plagioclase feldspar

Iron-oxide-rich breccia or weathered ironstone

Hematite–goethite ironstone, likely brecciated and quartz-bearing

Rhyolite (possibly porphyritic and altered)

Volcanic felsic rock; primarily quartz, alkali feldspar, plagioclase, and volcanic glass, with iron-oxide alteration

Weathered iron-rich sandstone or ironstone cobble

Ferruginous sandstone/ironstone, chiefly quartz (SiO₂) cemented or stained by iron oxides and hydroxides

Dark mafic rock, likely basalt

Basalt; primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Unidentified rounded mineral/rock fragment

Indeterminate; likely a weathered quartz-rich stone or iron-stained granite fragment

Gneiss

Gneiss

Unidentified gray weathered rock

Possibly weathered granite or granitic gneiss; exact identification requires a fresh surface and tests

Granite

Granite (Felsic Plutonic Rock)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Likely polished copper-bearing mineral specimen (possibly chrysocolla with iron-oxide staining)

Chrysocolla, Cu₂H₂Si₂O₅(OH)₄·nH₂O; identification uncertain from image

Quartz-rich breccia or vein quartz with iron staining

Microcrystalline to crystalline SiO₂, likely quartz with iron oxides/hydroxides and altered host rock

Metallic sulfide-bearing metamorphic rock

Likely graphitic schist or sulfide-rich schist, with possible pyrite/arsenopyrite and mica

Polished orbicular jasper (likely kambaba or ocean jasper)

Silicified microcrystalline quartz/chalcedony with iron-rich inclusions; mainly SiO₂

Green schist (probable)

Chlorite–mica schist; exact mineralogy cannot be confirmed from the photograph

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous quartz–feldspar metamorphic rock; exact mineralogy requires testing

Orbicular jasper

Orbicular jasper (microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions)

Tumbled yellow quartz-rich stone, likely yellow jasper or quartzite

Jasper/quartzite; mainly microcrystalline quartz (SiO₂), with iron-oxide staining

Tumbled serpentine

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile)

Likely hornblende-rich amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Quartz-veined metamorphic rock, likely quartzite or schist

Quartz-rich metamorphic rock with a milky-quartz vein; exact host rock is indeterminate from the photo

Granite-like pegmatitic rock

Coarse-grained granite or granitic pegmatite; likely quartz–feldspar–mica aggregate

Serpentinite with carbonate veins and weathering rind

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), with calcite/magnesite and accessory magnetite

Weathered gray-green basaltic rock

Basalt, likely altered to low-grade greenschist/amphibolite facies

Iron-rich concretion or slag-like rock

Goethite–hematite limonite concretion, possibly iron slag

Greenstone / altered basalt (probable)

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

Iron-rich breccia or weathered ironstone

Goethite–hematite-bearing ferruginous rock, possibly limonite

Serpentine-rich metamorphic rock

Serpentinite, likely with quartz or calcite veining and minor magnetite

Eclogite

Eclogite (Omphacite-Garnet rock)

Amphibolite

Amphibolite (rich in amphibole and plagioclase feldspar)

Quartz-bearing rock, possibly weathered granite or pegmatite

Quartz–feldspar–mica aggregate; exact classification is uncertain from the image

Quartz-rich pegmatite (weathered feldspar–quartz rock)

Granitic pegmatite; primarily quartz (SiO₂), feldspar, and minor biotite/iron-oxide minerals

Quartzite

Quartzite (SiO2)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Granite

Granite (Felsic intrusive igneous rock)

Mica Schist

Mica Schist (primarily Muscovite or Biotite)

Gneiss

High-grade Metamorphic Gneiss

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite schist/greenstone; possible actinolite- or epidote-bearing assemblage

Weathered greenstone (altered mafic rock)

Greenschist-facies metabasalt; typically chlorite, actinolite, epidote, and albite