Mineral Group

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Schorl (Black Tourmaline)

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Vanadinite

Vanadinite [Pb5(VO4)3Cl]

Sodalite

Na8(Al6Si6O24)Cl2

Unidentified weathered rock fragments

Likely mixed silicate rocks; specific identification requires testing

Vesicular basalt (possibly weathered amygdaloidal basalt)

Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine, with weathering minerals filling vesicles

Quartz / Feldspar Specimen

SiO2 (Quartz) / KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar Group)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Schorl (Black Tourmaline)

Sodium iron aluminum borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)

Sodalite

Na8(Al6Si6O24)Cl2 (Sodalite)

Icy Jadeite (Jade Bangle)

Jadeite, NaAlSi2O6 (Pyroxene group)

Gabbro

Gabbro

Serpentinite (Polished Egg)

Serpentinite (composed mainly of serpentine group minerals, Mg3Si2O5(OH)4)

Bivalve Fossil (Shell-bearing Sedimentary Rock)

Class Bivalvia (Phylum Mollusca) within a Calcarenite/Sandstone matrix

Quartz Veined Siltstone

Siltstone with Quartz (SiO2) intrusion

Tumbled jasper (likely brecciated or leopardskin jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions

Quartz with chlorite inclusions

Quartz (SiO₂), likely containing green chlorite-group minerals

Likely green aventurine or serpentine fragment

Aventurine quartz (SiO₂ with fuchsite mica) or serpentine-group mineral

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Red Garnet

Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Nuummite

Orthorhombic amphibole (Gedrite and Anthophyllite mixture) - (Mg,Fe)7Si8O22(OH)2

Granitic Pegmatite with Schorl

Granitic Pegmatite (Schorl: NaFe3Al6(Si6O18)(BO3)3(OH)3OH)

Slag

Metallurgical Slag

Blue apatite crystals

Apatite group, commonly fluorapatite (Ca₅(PO₄)₃F)

Pyrite (fool’s gold)

Iron disulfide, FeS₂; cubic pyrite-group sulfide

Red garnet crystal (probable almandine)

Garnet group; likely almandine, Fe₃Al₂(SiO₄)₃

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Red Garnet

Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)

Dalmatian jasper (often sold as Dalmatian stone)

Quartz-bearing microgranular felsic rock, commonly an altered rhyolite or related volcanic rock with black aegirine/arfvedsonite-group inclusions

Basalt

Extrusive Igneous Rock (Mafic)

Polished serpentine pebble

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

Tumbled green aventurine and/or serpentine

Quartz variety aventurine (SiO₂) and possibly serpentine-group minerals

Likely tumbled green aventurine or serpentine

Aventurine quartz (SiO₂ with fuchsite mica) or serpentine-group mineral

Amazonite

Microcline (variety Amazonite), K(AlSi3O8)

Green serpentine

Serpentine-group minerals, chiefly lizardite and antigorite; approximate formula Mg₃Si₂O₅(OH)₄

Black Tourmaline (Schorl)

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Rainbow Moonstone (White Labradorite)

Labradorite (Feldspar family, (Na,Ca)(Al,Si)4O8)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Biotite (Black Mica) in Host Rock

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

Red Jasper and Mookaite Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2