Metamorphic Or Sedimentary Depending On Local Grade

Gemstones (Emerald and Yellow Topaz or Citrine)

Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)

Banded gneiss

Gneiss; typically quartz–feldspar–mica assemblage

Garnet-Bearing Gneiss

Garnetiferous Feldspathic Gneiss

Granite Gneiss

Granitic Gneiss

Diorite

Diorite (Intermediate intrusive igneous rock)

White Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

Greenstone / Glauconitic Siltstone

Metabasalt or Glauconite-rich Sedimentary Rock

Granite Boulder

Felsic Intrusive Igneous Rock

Sandstone Beach Pebble

Clastic Sandstone (SiO2 - Quartz-dominant)

Dragon Blood Jasper

Epidote with Red Jasper (Quartz-rich aggregate)

White Marble

Recrystallized Calcite Rock (CaCO3)

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Dark shale or slate fragment

Carbonaceous shale, possibly low-grade slate; composition mainly clay minerals, quartz, and organic carbon

Fuchsite

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Banded gneiss (likely weathered paragneiss)

Gneiss; quartz–feldspar–mica ± amphibole assemblage

Kyanite

Kyanite (Al2SiO5)

Metallic sulfide mineral specimen, likely pyrite

Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate

Kyanite

Kyanite (Al2SiO5)

Quartz (Smoky/Milky variety with inclusion)

Silicon Dioxide (SiO2)

Milky Quartz with Matrix

Quartz (Silicon Dioxide, SiO2)

Banded metamorphic rock, likely mica schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Quartz-rich sandstone or quartzite fragment

Quartz sandstone; possibly weakly metamorphosed quartzite (SiO₂-dominant)

Quartz (Smoky/Milky variety with matrix)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Schist

Schist (various mineral compositions)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz Pebble with Host Rock / Schist Matrix

Silicon Dioxide (SiO2) with Metamorphic Host Rock

Jadeite Jade

NaAl(Si2O6)

Mica Schist

Schist (muscovite/biotite rich regional metamorphic rock)

Copper Ore (Malachite/Chrysocolla bearing)

Cupriferous rock containing secondary copper minerals like Cu2CO3(OH)2

Chlorite-rich schist (probable greenschist)

Chlorite–quartz–mica schist; commonly derived from basalt or shale under greenschist-facies metamorphism

Pumice

Vesicular volcanic glass

Conglomerate

Conglomerate (clastic sedimentary rock)

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Phaneritic Plutonic Felsic Rock (Granite)

Crushed Granite and Quartz Gravel

Composite Igneous and Silicate Rock Aggregate

Foliated metamorphic rock, likely slate or phyllite

Slate–phyllite; primarily quartz, mica, and clay-derived minerals

Granite Glacial Erratic

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Weathered iron-rich rock, possibly garnet schist or mica schist

Foliated metamorphic rock; likely mica schist with iron oxides and quartz, but exact identification is uncertain from the image

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Gneiss

Gneiss