Not A Rock (Man Made Industrial Metal)

Iron meteorite candidate

Probable iron-rich meteorite; possible stony-iron or weathered nickel–iron alloy

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Quartzite

Quartzite (SiO2)

Decorated turquoise-like bead or mineral pendant

Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Quartzite (Milky)

Quartzite (SiO2)

Banded agate cabochon

Microcrystalline quartz (chalcedony), SiO₂

Quartzite

Quartzite (SiO2)

Turquoise ring cabochon

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or treated matrix turquoise

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Quartz Pebble

Silicon Dioxide (SiO2)

Slag Glass

Silicon dioxide with impurities

Limestone

Sedimentary Rock (Primarily CaCO3)

Obsidian-like volcanic glass (likely slag or natural obsidian)

Obsidian, primarily amorphous volcanic silica glass (approximately SiO₂); identification is uncertain from an image

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Pumice

Pumicite (Amorphous volcanic glass)

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Sea Glass (White/Clear)

Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Polished gemstone tower assortment

Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Dyed Crackle Quartz (Green)

Quenching-treated Quartz (Silicon Dioxide, SiO2)

Pyrite Concretion (Grapestone)

Iron Sulfide (FeS2) Concretion

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Goldstone (Brown/Gold variety)

Aventurine Glass (SiO2 with Copper inclusions)

Slag (Industrial Glass/Metal Waste)

Artificial silicate/ferro-silicate byproduct

Iron-rich meteorite candidate

Undetermined; possible stony-iron or iron-oxide-rich meteorite

Iron-rich meteorite candidate

Unclassified stony-iron or ordinary chondrite candidate

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Quartzite

Quartzite (SiO2)

Copper Ore (likely Malachite or Chrysocolla staining)

Copper Secondary Mineral (e.g., Cu2CO3(OH)2)

Iron-rich meteorite candidate

Unclassified stony-iron or iron meteorite fragment

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

Quartzite

Quartzite (SiO2)

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veins in metamorphic/igneous host rock

White Marble

Recrystallized Calcite (CaCO3)

Green obsidian (likely molded or heat-treated glass-like specimen)

Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)