Mineral Group

Plagioclase Feldspar

Plagioclase (NaAlSi3O8 - CaAl2Si2O8)

Feldspar (likely Amazonite or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Peridot

Olivine (specifically, the gem-quality variety forsterite, (Mg,Fe)2SiO4)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Garnet in Matrix

Almandine or Pyrope Garnet (X3Y2(SiO4)3) in Schist or Eclogite matrix

Feldspar

Potassium Feldspar (KAlSi3O8)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Polished green serpentine

Serpentinite, chiefly antigorite/lizardite Mg₃Si₂O₅(OH)₄

Smoky Quartz and Orthoclase Feldspar

Granitic Pegmatite (SiO2 + KAlSi3O8)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Likely garnet-bearing rock fragment

Garnet-bearing schist or gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Polished serpentine pebble

Serpentinite, chiefly serpentine-group minerals (chrysotile, lizardite, antigorite)

Feldspar (likely Orthoclase or Plagioclase)

Tectosilicate Feldspar (KAlSi3O8 to (Ca,Na)(Al,Si)4O8)

Polished serpentine

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

Cuprite

Cuprite (Copper(I) oxide, Cu2O)

Biotite / Black Mica

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

Polished garnet beads

Garnet group, commonly almandine–pyrope solid solution (approximately Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃)

Potassium feldspar

Orthoclase or microcline; KAlSi₃O₈

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

K-Feldspar (Microcline / Orthoclase)

Potassium Feldspar (KAlSi3O8)

Potassium Feldspar (Microcline)

KAlSi3O8

Tumbled pink feldspar (likely orthoclase or microcline)

Potassium feldspar — KAlSi₃O₈

Feldspar (Orthoclase/Microcline)

Potassium Feldspar (KAlSi3O8)

Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Seraphinite

Clinochlore (a variety of the chlorite group)

Serpentine (Serpentinite)

Serpentinite / (Mg,Fe)3Si2O5(OH)4

Likely raw garnet fragment

Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)

Tumbled greenstone (likely serpentine or nephrite-like material)

Serpentinite, chiefly serpentine-group minerals; exact identification requires testing

Polished serpentine (likely bowenite/antigorite)

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

Tumbled serpentine (likely bowenite/antigorite)

Serpentine-group minerals, chiefly antigorite or lizardite; commonly Mg₃Si₂O₅(OH)₄

Garnet, likely almandine–spessartine

Garnet-group nesosilicate; commonly almandine Fe₃Al₂(SiO₄)₃ or spessartine Mn₃Al₂(SiO₄)₃

Polished serpentine (likely greenstone)

Serpentine-group minerals, chiefly antigorite/lizardite: Mg₃Si₂O₅(OH)₄

Green serpentine or nephrite-like stone

Serpentinite, chiefly serpentine-group minerals; exact identification would require testing

Polished serpentine (likely bowenite)

Serpentine-group minerals, chiefly antigorite; bowenite is a nickel-rich translucent variety

Serpentine (rough serpentine-rich rock)

Serpentine-group minerals, chiefly antigorite and/or lizardite; composition broadly Mg₃Si₂O₅(OH)₄

Epidote

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

Sodalite

Na8(Al6Si6O24)Cl2

Tumbled white feldspar (likely albite or orthoclase)

Feldspar-group tectosilicate; commonly albite NaAlSi₃O₈ or orthoclase KAlSi₃O₈

Plagioclase Feldspar

NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)

Tourmaline in Quartz Matrix

Complex silicate of boron and aluminum (Schorl/Elbaite/Dravite) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Tourmalinated Quartz or Schorl

Silicate mineral, specifically Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4) or dark Tourmaline crystal cluster