Man Made Glass

Ferrous Slag (Iron Smelting By-product)

Fused Siliceous Slag

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Ferrochrome Slag

Industrial Glassy Slag (Fe-Cr alloy byproduct)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Chert / Flint

Chert (varieties include Flint)

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

Amber (Copal)

Organic gemstone, fossilized tree resin (often immature amber or copal)

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Chert

Chert (microcrystalline quartz)

Quartz (Pebble)

Quartz (SiO₂)

Brecciated jasper (likely red-and-cream jasper)

Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining

Basalt

Basalt

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

United States Quarter Dollar

Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)

Rose Quartz Carving

Quartum roseum (Variety of Quartz, SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Quartz

Silicon Dioxide (SiO₂)

Smoky Quartz

Smoky Quartz (SiO2)

Chert (or possibly Flint)

Chert (variant: Flint)

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Glazed Ceramic Tile

Fused Silicate-Clay composite

Smoky quartz crystal cluster

Quartz, silicon dioxide (SiO₂), likely smoky variety

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Polished greenstone/serpentine pebble (probable)

Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile); possible accessory olivine or chlorite

Flint or chert, possibly a knapped stone tool

Microcrystalline quartz (SiO₂), commonly chalcedony with possible carbonaceous impurities

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Basalt

Basalt

Granite

Granite (plutonic igneous rock)

Sea Glass

Silica (SiO2) - Amorphous

Fossilized echinoid (sea urchin), likely a flint/chalk-associated test

Echinoid fossil; likely a regular echinoid such as Echinocidaris or related taxon, composed mainly of recrystallized calcite (CaCO₃)

Diabase (Dolerite)

Diabase / Dolerite

Land Snail Shell

Gastropoda (Calcium Carbonate, CaCO3)

Polished banded agate pendant

Agate, a microcrystalline variety of chalcedony (SiO₂)

Sandstone

Arenite

Chert Pebble

Microcrystalline Quartz (SiO2)