Mineralogical

Petrified Wood

Silicified Wood (SiO2)

Tiger's Eye (with Hematite/Jasper)

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown

Polished amber

Fossilized tree resin (primarily organic polymerized diterpenes)

River Pebbles (Stream-rounded rocks)

Fluvial Detritus (varied mineralogy)

Yellow chalcedony (likely dyed or heat-treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Dalmatian jasper (often sold as Dalmatian stone)

Porphyritic alkali feldspar–quartz syenite, commonly with black arfvedsonite/aegirine-group amphibole inclusions

Tumbled dalmatian jasper (likely)

Microcrystalline quartz/chalcedony with black amphibole or aegirine inclusions; commonly sold as “dalmatian jasper”

Tumbled green aventurine (probable)

Quartz (SiO₂), commonly with fuchsite mica inclusions

Tumbled green jasper or serpentine

Jasper: microcrystalline quartz (SiO₂); possible serpentine: Mg₃Si₂O₅(OH)₄

Polished green serpentinite

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

Tumbled orange chalcedony and a gray stone disk

Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate

Graphite Schist

C (Carbonaceous Schist)

Polished dark-blue cabochon, possibly blue sodalite

Undetermined; blue sodalite is a possible identification (Na₈Al₆Si₆O₂₄Cl₂)

Serpentine-rich rock (likely antigorite serpentinite)

Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Small rounded yellow pebble, likely quartz-rich rock

Indeterminate from image; possibly iron-stained quartz or chert

Small metallic meteorite-like specimen

Unclassified iron-rich meteorite candidate; possibly an ordinary chondrite or terrestrial slag

Fossilized oyster shell in limestone

Bivalvia fossil; chiefly calcite (CaCO₃)

Polished greenstone pebble (likely serpentine or chlorite-rich stone)

Serpentine-group minerals, commonly antigorite/lizardite; possible chlorite-rich metamorphic rock

Granite (Alkali-feldspar Granite)

Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Pink Granite

Granite (Phaneritic intrusive igneous rock)

Quartzite

Quartzite (primarily SiO2)

Granite (with Orthoclase and Quartz)

Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)

Granite

Granite (Plutonic Igneous Rock)

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)

Pink Granite

Potassium Feldspar-Rich Granite

Granite

Granite (Alkali-feldspar, Quartz, and Plagioclase composition)

Weathered greenish metamorphic rock, possibly serpentinite

Serpentinite, commonly dominated by antigorite/lizardite Mg₃Si₂O₅(OH)₄; identification is uncertain from the photograph

Blue-gray tumbled stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; identification is tentative from the photograph

Blue copper-mineral rock, likely chrysocolla-bearing copper ore

Chrysocolla (hydrated copper aluminosilicate), possibly with malachite, quartz, or host rock

Polished ruby-in-zoisite (anyolite), likely

Ruby-bearing zoisite: zoisite Ca₂Al₃(SiO₄)₃(OH), with corundum Al₂O₃ and commonly amphibole

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Hag Stone

Sandstone or Limestone with Solution Holes (Bioturbation/Erosion)

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Greenstone / altered mafic rock

Likely chlorite–actinolite schist or metabasalt; exact identification requires testing

Mixed River Pebbles (Jasper, Hematite, and Quartzites)

Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)

Labradorite

(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)

Sand Grain (Quartz)

Silicon Dioxide (SiO2)

Amazonite-bearing feldspar (likely raw amazonite)

Amazonite, a blue-green variety of microcline feldspar; KAlSi₃O₈

Green fluorite crystal

Fluorite (calcium fluoride, CaF₂)