Metamorphic (Altered Igneous Rock)

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite, Calcite, Sodalite, and Pyrite)

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Citrine

Silicon Dioxide (SiO2)

Weathered mafic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and minor olivine or iron oxides

Epidote

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

Epidote in Matrix (Unakite-like Rock Fragment)

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

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 with Quartz (SiO2)

Biotite Mica

K(Mg,Fe)3AlSi3O10(OH)2

Greenstone, likely chlorite-rich schist

Chlorite schist; chiefly chlorite, actinolite/amphibole, feldspar, and quartz

Blue Tiger's Eye

Crocidolite in Quartz (altered)

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartz-rich conglomeratic rock (likely granitic breccia or conglomerate)

Uncertain; quartz–feldspar rock in a fine-grained matrix, possibly weathered granite or polymictic conglomerate

Unakite

Altered Granite (Epidotized Feldspar with Quartz)

Pale greenish stone, likely serpentine or altered ultramafic rock

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

Green Serpentine

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

Epidote

Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Lapis Lazuli (Low Grade)

Lapis Lazuli (Metamorphic rock containing lazurite, calcite, and pyrite)

Rough Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Lapis Lazuli

Lapis Lazuli (Complex metamorphic rock primarily composed of Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Weathered iron-rich rock, possibly basalt or ironstone

Likely vesicular basalt or ferruginous breccia; exact identification requires testing

Greenish quartz (likely prase/chalcedony)

Quartz, SiO₂; possibly green chalcedony or chlorite-included quartz

Greenstone Porphyry

Altered Porphyritic Andesite/Basalt

Weathered granite or granitic pebble

Granite; chiefly quartz, feldspar, and mica

Weathered iron-rich rock, possibly basalt or limonite-bearing sandstone

Undetermined; likely Fe-oxide-stained basalt or ferruginous sandstone (hematite/goethite-bearing)

Gneiss (likely garnet-bearing or migmatitic gneiss)

Felsic banded gneiss; chiefly quartz, feldspar, mica, and possibly garnet

Likely greenstone (serpentinized ultramafic rock)

Serpentinite, dominated by serpentine-group minerals (chrysotile/lizardite/antigorite), possibly with chlorite or epidote

Serpentinite

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

Quartz (Milky or Smoky variant)

Silicon Dioxide (SiO2)

Iron-rich quartzite or limonite-bearing rock

Quartzite (SiO₂) with iron oxides/hydroxides, chiefly hematite and goethite

Pink Granite / Gneiss Pebble

Quartz-Feldspar Granitic Rock

Unakite (or Epidotized Granite)

Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)

Unakite

Altered Granite (Orthoclase + Epidote + Quartz)

Weathered greenstone (likely serpentinite or altered basalt)

Serpentinite-group rock, commonly dominated by serpentine minerals (antigorite/lizardite); exact identification requires testing

Serpentinite

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Quartzite with Mica Matrix

Metamorphic Quartz-Mica Schist/Quartzite

Polished gray-brown stone slab, possibly soapstone or schist

Indeterminate; likely talc-rich soapstone (steatite) or mica schist

Unakite-like granitic pebble

Altered granite composed mainly of quartz, feldspar, and epidote; red areas may be potassium feldspar or iron-stained feldspar

Rounded dark pebble, possibly weathered basalt

Fine-grained mafic volcanic rock; likely basalt, but identification is uncertain from the photograph

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Phyllite (possibly low-grade greenish slate)

Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula