Sedimentary Rock (Altered)

Fossil scallop shell

Scallop (family Pectinidae); shell composed chiefly of calcite and/or aragonite (CaCO₃)

Unakite

Altered Granite (Epidotized Granite)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous schist/gneiss; composition likely quartz, feldspar, mica, and altered mafic minerals

Green serpentine-rich rock (possibly serpentinite)

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

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Polished tiger iron

Tiger iron: banded quartz–crocidolite/jasper–hematite rock

Weathered mafic rock, likely basalt

Basalt (fine-grained aggregate dominated by plagioclase and pyroxene; identification is visual and uncertain)

Peridotite (Dunite/Lherzolite)

Ultramafic Peridotite

Red Jasper

Jasper (a variety of Chalcedony, SiO₂)

Jasper and Quartz Pebble

Silicon Dioxide (SiO2) microcrystalline quartz variety

Blue-green amphibole-bearing rock (possibly actinolite schist)

Likely actinolite-rich rock; actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Banded gneiss

Quartz–feldspar gneiss, with dark biotite or amphibole

Unakite

Epidotized Granite

Weathered basaltic rock (likely basalt)

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine

Greenstone / Epidosite

Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)

Likely copper-bearing rock (identification uncertain)

Possibly native copper with copper oxides; the image is insufficient for a definitive identification

Iron-rich breccia or weathered ironstone

Goethite–hematite-bearing limonite, possibly with quartz and altered rock fragments

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Fossilized bivalve shell fragment

Pectinid or related scallop bivalve; shell originally composed mainly of calcite (CaCO₃)

Weathered greenstone (probable)

Greenstone; likely altered mafic rock composed chiefly of chlorite, epidote, and albite

Large rounded boulder, likely foliated metamorphic rock (possibly gneiss or schist)

Undetermined foliated silicate rock; mineral species cannot be confirmed from the photograph

Tumbled iron-rich stone, possibly jasper or weathered basalt

Indeterminate; likely iron-stained microcrystalline quartz (jasper) or altered basalt

Rounded yellow-green pebble, likely serpentine or quartzite

Provisional: serpentinite/serpentine-rich rock; alternatively iron-stained quartzite

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)

Iron-stained quartzite or quartz-rich metamorphic rock

Quartzite, predominantly crystalline SiO₂, with iron-oxide minerals (hematite/goethite)

Quartz vein in dark host rock

Quartz (SiO₂), likely in basalt, gabbro, or altered mafic rock

Unakite

Altered Granite (Epidotized Granite)

Quartz-rich granite or granitic gneiss

Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly weakly metamorphosed

Blue Tiger's Eye

Crocidolite in Quartz (altered)

Weathered sandstone cobble

Clastic sandstone, likely quartz-rich arenite or arkose

Veined dark-green pebble (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals; pale veins may be calcite or quartz

Unakite

Altered Granite (Epidotized Granite)

Greenstone / Serpentinite

Antigorite/Lizardite series (Mg,Fe)3Si2O5(OH)4

Rounded quartz-rich pebble, likely sandstone or granitic-derived pebble

Indeterminate clastic rock; likely quartz-rich sandstone/conglomerate clast

Greenstone (likely chlorite- or actinolite-rich metabasalt)

Metamorphosed mafic volcanic rock; commonly greenschist-facies basalt, composed chiefly of chlorite, actinolite, epidote, and albite

Mottled green-and-white rock fragment

Possibly serpentinite or a chlorite-rich metamorphic rock; identification is uncertain from the photograph alone.

Serpentine

(Mg,Fe)3Si2O5(OH)4

Weathered greenstone (probable)

Chlorite–actinolite–epidote metamafic rock; exact identification requires testing

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Likely tumbled black tourmaline (schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Quartz-bearing altered rock

Likely quartz vein in weathered schist or gneiss; quartz is SiO₂

Pale greenish stone, likely serpentine or altered ultramafic rock

Serpentinite (主要 minerals: antigorite/lizardite, Mg3Si2O5(OH)4); identification is tentative from the image