Metamorphic (Altered Igneous Rock)

Quartz-rich pegmatitic rock, possibly altered granite

Quartz–feldspar pegmatite; probable composition of quartz (SiO₂), feldspar, and mica/secondary alteration minerals

Milky Quartz with Talc / Serpentine

Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2

Greenstone pebble (identification uncertain from photo)

Greenstone, typically metamorphosed mafic rock composed of chlorite, actinolite, and epidote

Epidote

Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))

Likely weathered basalt with iron-oxide alteration

Basalt (fine-grained mafic volcanic rock), chiefly plagioclase and pyroxene with altered iron-bearing minerals

Greenstone

Epidiorite / Altered Basalt

Dumortierite in Quartz

Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)

Unakite

Altered Granite (Epidotized Granite)

Rounded pebble, likely greenstone or altered basalt

Likely chlorite- or epidote-altered basalt; identification is uncertain from the image alone

Rounded dark river pebble, possibly serpentinite

Serpentinite (serpentine-group minerals; commonly lizardite/chrysotile/antigorite), identification tentative

Weathered granite or granitic gneiss

Granite; primarily quartz (SiO₂), feldspar, and mica, possibly with metamorphic foliation

Weathered quartz-rich rock, possibly granite or gneiss

Granite-like aggregate: quartz (SiO₂), feldspar, and minor dark minerals

Greenish metamorphic rock (possibly chlorite schist)

Chlorite-rich schist; exact identification is uncertain from the image

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Epidotized Granite

Gabbroic rock, possibly hornblende gabbro

Gabbro; coarse-grained mafic silicate rock dominated by plagioclase and pyroxene, with possible hornblende and magnetite

Likely basaltic or mafic metamorphic rock

Fine-grained mafic rock, probably basalt or altered basalt; composition mainly plagioclase and pyroxene, possibly chlorite/epidote

Epidote in Quartz (Epidosite)

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Lapis Lazuli

Lazurite-rich metamorphic rock

Likely weathered quartz-bearing rock (uncertain identification)

Possibly quartz-rich granite or granitic aplite; exact identification requires a clearer, larger image and tests

Unakite / Feldspar Veined Metamorphic Pebble

Metamorphic Rock with K-Feldspar, Epidote, and Quartz

Greenstone / Basalt with Amygdule

Amygdaloidal Basalt (altered to Greenstone)

Dark igneous rock, likely basalt or diabase, with a second purplish specimen

Basalt/diabase; exact identification is uncertain from the photograph

Unakite

Altered Granite (Epidotized Granite)

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Altered Granite (Granitic Metamorphic Rock)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Labradorite-bearing gneiss or altered feldspathic rock

Plagioclase-rich gneiss, locally labradorescent; composition likely plagioclase feldspar, quartz, mica, and iron-oxide veining

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and mica

Serpentinite (likely)

Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)

Rounded greenstone pebble

Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing

Peridotite

Ultramafic igneous rock (primarily olivine and pyroxene)

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

Likely raw mica-bearing metamorphic rock or mineral fragment

Tentatively biotite schist; visually similar dark mica-rich material

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

Serpentine

Serpentine-group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Greenish translucent mineral fragment

Indeterminate; possibly serpentine, epidote, or green glassy feldspar

Greenstone

Metamorphosed Mafic Igneous Rock

Granite

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

Greenish-gray rock fragment, likely serpentine-rich stone

Possibly serpentinite (serpentine-group minerals; identification is uncertain from the image)