Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)

Leland Blue Stone

Anthropogenic Iron Smelting Slag

Labradorite

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Biotite Mica

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

Gneiss

High-grade Metamorphic Gneiss

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Coquina

Bioclastic Limestone

Chert (Arrowhead Preform or Point)

Chert (Microcrystalline Quartz, SiO2)

Granitic Gneiss

Gneiss (High-grade Metamorphic Rock)

Schist

Schist

Gneiss (Pebble)

Gneiss

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Bronzite

Enstatite (magnesium iron silicate), (Mg,Fe2+)SiO3

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Citrine

Silicon dioxide (SiO2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Slag (Industrial Glass)

Anthropogenic Vitreous Slag (Post-industrial byproduct)

Citrine

Citrine (Silicon Dioxide, SiO2)

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Basalt Pebble (Beach Stone)

Basalt (Mafic Extrusive Igneous Rock)

Colorless Quartz (Rhinestone)

Silicon Dioxide (SiO2)

Greenstone or Chlorite Schist

Greenschist / Chlorite schist

Engraved polished dark stone (likely slate or basalt)

Probable fine-grained slate (microcrystalline phyllosilicates), possibly basalt; exact identification requires testing

Chert / Flint Handaxe

Cryptocrystalline Quartz (SiO2)

Banded Gneiss

Banded Gneiss (High-grade Metamorphic Rock)

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Citrine (likely Heat-Treated)

Quartz (Silicon Dioxide, SiO2)

Epidote

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

Greenstone

Metabasalt (composed of chlorite, epidote, and actinolite)

Granodiorite (Gneissic texture)

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Labradorite (likely)

(Ca,Na)(Al,Si)4O8

Basalt Pebble

Extrusive Igneous Rock

Dacite

Dacite (Intermediate volcanic rock)

Biotite on Quartz

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Likely gabbro or dark amphibolite

Gabbro: coarse-grained mafic rock composed mainly of plagioclase and pyroxene; possible amphibolite: hornblende and plagioclase

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂)

Mixed rounded stream pebbles

Most appear to be granitic and mafic igneous rocks, including granite, gneiss, basalt, and possibly quartzite; exact identification is uncertain from the image.

Serpentine / Antigorite

Mg3Si2O5(OH)4 (Serpentine Group)

Greenstone

Metabasalt / Greenschist facies rock