Manufactured Stone

Asphalt fragment

Bituminous concrete

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Small rounded stone, likely quartz-rich granite or granitic rock

Probable granitoid fragment; mainly quartz (SiO₂) and feldspar, with minor dark mica/amphibole

Quartzite

Metamorphic Quartzite (SiO2)

Multi-stone gemstone ring

Likely faceted blue topaz or synthetic blue stone with clear stones, possibly cubic zirconia or diamond; metal setting appears silver-colored alloy

Crackle Glass (Simulated Gemstone)

Amorphous Solid (SiO2)

Rhinestone

Artificial Glass/Crystal

Note: The image provided is a fabric sock, not a geological specimen.

Polyester-Cotton Blend with Elastane

Red jasper cabochon pendant

Jasper—opaque microcrystalline quartz/chalcedony, primarily SiO₂, colored red by iron oxides

Tumbled yellow-green chalcedony or serpentine

Microcrystalline quartz (SiO₂), possibly chrysoprase; alternative: serpentine-group mineral

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Possibly tumbled dark stone or mineral specimen

Indeterminate from image; possibly black tourmaline, basalt, or another dark silicate

Colorless faceted gemstone (most likely synthetic cubic zirconia)

Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond

Polished black stone, possibly basalt or black jasper

Basalt (fine-grained mafic rock) or microcrystalline quartz if jasper

Beaded bracelet with black and white stone beads

The white beads may be howlite (Ca₂B₅SiO₉(OH)₅); the glossy black beads cannot be identified confidently from the image and may be obsidian, onyx, or another material.

Weathered sandstone or iron-rich sedimentary rock fragments

Quartz-rich sandstone, locally ferruginous; exact identification requires testing

Swirled Agate Bead

Silicon Dioxide (SiO2)

Opalite (Man-made Glass)

Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

White tumbled stone (possibly milky quartz)

Likely quartz, SiO₂; exact identification is uncertain from the image

Blue Obsidian

Obsidian

Sea Glass

Silica (SiO2) - Amorphous

Sea Glass

Amorphous silicon dioxide (glass)

Gemstone stud earrings, likely set with clear stones

The stones may be diamond (carbon, C) or colorless cubic zirconia (ZrO₂); the image is insufficient to distinguish them.

Mixed small mineral specimens, likely quartz varieties

Uncertain from the image; translucent pieces may be quartz (SiO₂), while golden-brown pieces could be iron-stained quartz or calcite

Borosilicate Glass (Manufactured)

SiO2 + B2O3 (Silicon dioxide and Boron trioxide)

Tumbled yellow-brown quartzite or jasper

Quartzite, predominantly microcrystalline quartz (SiO₂), possibly iron-stained jasper

Vesicular volcanic rock, likely pumice

Pumice (highly vesicular volcanic glass; composition commonly rhyolitic to andesitic)

Possible flint/chert fragment

Microcrystalline quartz (SiO₂), likely chert or flint

Glazed Ceramic Tile

Fused Silicate-Clay composite

Spherical sandstone concretion

Sandstone concretion, commonly quartz-rich arenite cemented by calcite, silica, or iron oxides

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

Cut diamond-like gemstone

Likely cubic zirconia (zirconium dioxide, ZrO₂) or glass; natural diamond (carbon, C) cannot be confirmed from an image

Travertine (Ceramic Tile)

Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)

Tumbled white stone beads, likely marble or quartz

Undetermined; possibly marble (recrystallized calcite, CaCO₃) or milky quartz (SiO₂)

Tumbled black stone, likely black obsidian

Obsidian — natural volcanic glass, predominantly silica-rich rhyolitic composition

Black tumbled stone, likely basalt or black jasper

Most consistent with fine-grained basalt (mainly plagioclase and pyroxene); exact identification requires testing

Brick fragment (Man-made material)

N/A (Fired clay)

Polished hematite

Hematite (Fe₂O₃), likely a tumbled specimen

Faceted clear gemstone (likely glass imitation or quartz)

Uncertain; appearance is consistent with colorless quartz (SiO₂), but the strong uniform brilliance may indicate cut glass or cubic zirconia

Faceted colorless gemstone, likely cubic zirconia or diamond

Most likely synthetic cubic zirconia (ZrO₂); diamond (C) is a less certain alternative

Weathered sandstone or iron-stained sedimentary stone

Quartz-rich sandstone, commonly arkose or lithic sandstone; composition cannot be confirmed visually