Sedimentary Rock (Altered)

Quartz-rich vein rock, possibly milky quartz in altered host rock

Quartz (SiO₂), likely with weathered silicate minerals and iron/manganese staining

Banded Iron Formation (BIF)

Banded Iron Formation (SiO2 + Fe2O3)

Epidosite

Epidosite (composed primarily of Epidote and Quartz)

Weathered granite-like rock

Granite or granodiorite; quartz–feldspar–mica aggregate

Weathered limestone or calcareous sandstone

Calcite-rich carbonate rock, likely limestone (CaCO₃), possibly sandy or dolomitic

Polished rhyolite (likely porphyritic rhyolite)

Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides

Iron-rich quartzite or limonite-bearing rock

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

Polished greenstone pebble (likely epidote-bearing stone)

Epidote–chlorite amphibolite or altered basalt; composition likely epidote, chlorite, amphibole/pyroxene, and iron oxides

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Green Andesite (or Greenstone / Altered Volcanic Rock)

Intermediate Volcanic Rock with Chlorite/Epidote Alteration

Serpentine-rich altered rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, talc, or chlorite

Quartz-bearing altered rock, likely quartzite or hydrothermal quartz vein

Predominantly quartz (SiO₂), with possible chlorite/serpentine and iron-oxide alteration

Blue Chert

Microcrystalline Quartz (SiO2)

Lapis Lazuli

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

Epidote

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

Fuchsite Schist

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist

Turquoise (Rough Specimens)

Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Weathered granitic rock

Granite or granodiorite, likely quartz–feldspar–mica aggregate

Iron-stained weathered volcanic rock (probable basalt/andesite)

Altered basaltic–andesitic rock, chiefly plagioclase and pyroxene with iron oxides/hydroxides

Gneiss (likely garnet-bearing or migmatitic gneiss)

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

Copper-bearing basalt or volcaniclastic rock

Cuprite–malachite-bearing mafic volcanic rock; likely basalt with copper sulfides/oxides

Tumbled jasper pebble

Microcrystalline quartz (SiO₂), commonly with iron-oxide inclusions

Greenstone pebble (likely altered basalt)

Chlorite–actinolite–epidote altered basalt; precise identification requires testing

Unakite-like epidote–feldspar rock

Epidote + K-feldspar/plagioclase ± quartz; compositionally similar to unakite

Tumbled reddish-brown basalt or andesite cobble

Fine-grained mafic to intermediate volcanic rock; commonly plagioclase, pyroxene, and magnetite, with iron-oxide staining

Tumbled granite

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

Zebra Jasper

Silicon dioxide (microcrystalline quartz), SiO2

Jasper and Epidote Breccia

Silicified Brecciated Rock with Epidote

Greenstone pebble, likely altered basalt

Metabasalt/greenstone; commonly chlorite–epidote–actinolite with albite and iron oxides

Unakite

Altered Granite (Orthoclase + Epidote + Quartz)

Vesicular quartz-rich rock, possibly weathered rhyolite or hydrothermal quartz

Likely quartz (SiO₂) with altered feldspar, iron oxides, and cavities; exact identification requires testing

Polished tiger’s-eye jasper (likely brecciated jasper)

Quartz-rich microcrystalline silica, chiefly SiO₂, with iron oxides and possible fibrous pseudomorphs

Iron-rich meteorite candidate

Unclassified stony-iron or iron meteorite candidate; possibly limonite/hematite-bearing terrestrial rock

Weathered gray-green volcanic rock

Likely basaltic andesite or altered basalt; precise identification requires a fresh surface and testing

Lapis Lazuli (in Matrix)

Na8[Al6Si6O24]S2 (Lazurite as the primary component)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Red Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Limonite/goethite-rich ironstone

Hydrated iron oxides, chiefly goethite (α-FeO(OH)) and limonite (FeO(OH)·nH₂O)

Unidentified dark reddish-brown rock or mineral specimen

Indeterminate from the blurred image; possibly iron-stained quartz, jasper, or a metallic sulfide-bearing rock

Pink Granite (Unakite-bearing Granite Pebble)

Granite (rich in Potassium Feldspar / Orthoclase)

Fossil Coral

Coral Limestone (a type of biogenic sedimentary rock)