Sedimentary (Processed Mineral Product)

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Iron-stained quartz-bearing rock (likely gold-bearing quartz vein fragment)

Quartz (SiO₂) with iron oxides/hydroxides, possibly limonite/goethite and minor sulfides

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

Vesicular scoria (oxidized basaltic scoria)

Scoria; vesicular mafic volcanic rock, typically composed mainly of plagioclase, pyroxene, and iron-rich glass/oxides

Jasper and Chalcedony

Silicon Dioxide (SiO2) microcrystalline quartz

Jasper and Chalcedony Composite

Silicon Dioxide (SiO2) microcrystalline quartz

Fossil Shark Tooth

Chondrichthyes (class)

Yellow Jade (often Serpentine or Dolomite)

Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.

Fossilized Shark Tooth

Chondrichthyes teeth

White Quartz

Silicon Dioxide (SiO2)

Raw ruby (corundum)

Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

Black cabochon pendant, likely onyx or black glass

Most likely black chalcedony (microcrystalline quartz, SiO₂); the surrounding stones may be cubic zirconia or glass

Blue kyanite in matrix

Kyanite, Al₂SiO₅

Carved translucent jade pendant

Likely nephrite jade (actinolite–tremolite series); possibly jadeite or chalcedony, identification requires testing

Tumbled serpentinite (serpentine stone)

Serpentinite, dominated by serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and chromite

Mixed Rock and Mineral Specimen Set

Multiple (Quartz, Chert, Shale)

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Native metallic specimen, possibly galena or a sulfide-rich ore fragment

Tentatively galena (lead sulfide, PbS), possibly mixed with iron/copper sulfides

Hematite

Iron Oxide (Fe2O3)

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Iron-rich sulfide nodule (likely pyrite-bearing)

Likely pyrite (FeS₂) and iron oxides/hydroxides, possibly a weathered sulfide concretion

Mixed Rock and Mineral Collection

Multiple geological specimens

Petrified Wood

Silicified wood (SiO2)

Tumbled tiger’s-eye

Quartz variety, chiefly fibrous chalcedony pseudomorph after crocidolite; SiO₂

Iron-stained quartz-bearing rock

Quartz-rich limonite/goethite specimen; exact identification requires testing

Sandstone

Arenite (primarily SiO2)

Weathered vesicular basalt

Basalt, chiefly plagioclase and pyroxene with secondary iron oxides and zeolite/calcite fillings

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

Mixed river stones and gravel

Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate

Chert (Flint)

Silicon dioxide (SiO2)

Chert / Flint

Cryptocrystalline quartz (SiO2)

Chert

Chert (SiO2, Silicon Dioxide)

Quartz Pebble

Silicon Dioxide (SiO2)

Feldspar

Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Mixed Gemstone and Mineral Collection

Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)

Malachite cabochon or polished bead

Malachite, Cu₂CO₃(OH)₂

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Quartz with Matrix

Silicon Dioxide (SiO2)

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Chert (and associated Sedimentary rocks)

Microcrystalline Silica (SiO2)