Man Made Metamorphic Style Composite

Marble

Recrystallized Calcite (CaCO3)

Gold and Diamond Jewelry

Native Gold (Au) and Diamond (C)

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Tumbled milky quartz, possibly quartzite

Quartz (SiO₂); the specimen may be a quartz-rich metamorphic rock if its texture is granular

Polished milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Black-and-white veined stone, likely marble or calcite-veined metamorphic rock

Probable calcite marble: predominantly recrystallized calcite (CaCO₃) with dark graphite-, mica-, or amphibole-rich minerals

Milky quartz crystal fragment

Quartz, silicon dioxide (SiO₂)

Biotite-rich schist

Mica schist; chiefly quartz, biotite mica, feldspar, and accessory sulfides/iron oxides

Graphitic schist (probable)

Graphite-bearing mica schist; chiefly quartz, mica, and graphite

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich vein

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Greenstone (likely serpentinite)

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

Likely hornblende amphibolite fragment

Amphibolite, chiefly hornblende and plagioclase feldspar

Plagioclase Feldspar (specifically Albite/Oligoclase)

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

Milky quartz (likely quartzite or massive quartz)

Quartz, silicon dioxide (SiO₂)

Banded gneiss pebble

Gneiss, commonly quartz–feldspar–mica gneiss

Quartz Crystal Cluster / Quartzite

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Likely raw garnet fragment

Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Diamond (Baguette cut)

Carbon (C)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Pyrite (“fool’s gold”) specimens

Pyrite, iron disulfide (FeS₂)

Serpentinite (probable)

Serpentinite; chiefly serpentine-group minerals (antigorite/lizardite/chrysotile), commonly with magnetite and minor olivine/pyroxene

Yellow Jade

Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)

Red Jasper (Quartzite)

Silicon Dioxide (SiO2) with iron oxide inclusions

Calcite

Calcite (CaCO3)

Polished rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly mixed with quartz and manganese oxides

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Emerald (Rough)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Unidentified dark, foliated metamorphic rock

Likely biotite schist or hornblende-bearing gneiss; exact identification requires testing

Quartz-veined dark metamorphic rock

Likely quartz-mica schist or foliated basalt with a quartz vein

Brecciated jasper/quartz-rich polymictic rock

Silicified breccia, chiefly microcrystalline quartz (SiO₂) with iron-oxide and sulfide staining

Small tumbled blue-green stone, possibly chrysocolla or turquoise

Indeterminate copper-bearing mineral; possible chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O) or turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O)

Marble

Metamorphosed Limestone (principally CaCO3)

Tumbled Clear Quartz

Silicon Dioxide (SiO2)

Mixed mineral and rock specimen collection

Mixed assemblage, visibly including quartz, chalcedony/agate, feldspar, mica, dark mafic rocks, and possibly calcite or gypsum