Synthetic (Not A Rock Or Mineral)

Schist

N/A (a rock type, not a mineral formula)

White Sapphire

Corundum (Al2O3)

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)

Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Opal

Hydrous silicon dioxide (SiO2·nH2O)

N/A - Non-Geological Item

Bismuth

Bismuth (Bi)

Transit Token (RTD Denver)

Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Diamond (Rough)

Diamond (Carbon, C)

Crystal Quartz Beads (likely Clear Quartz)

Quartz (SiO₂)

Amethyst

Amethyst (SiO2 - Silicon Dioxide with iron impurities)

Granite

Granite (a felsic intrusive igneous rock)

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Bowling Ball (Brunswick T-Zone Deep Space)

Polyester resin / Polyurethane polymer

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Fursuit (Synthetic Fur Specimen)

Canis anthropomorphus syntheticus

Diamond (faceted)

Diamond (Pure Carbon, C)

Pumice

Pumice (volcanic rock)

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.

Emerald

Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium

Azurite-Malachite (often a mixed specimen)

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Pebble

Clast (specifically a granule or small pebble)

Bauxite Ore

Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Abbey Bominable (Monster High character)

Anthropomorphic Yeti / Digital Animation

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Blue Goldstone

Aventurine Glass

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Rutilated Quartz

SiO2 with TiO2 inclusions (Rutile)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Strawberry Quartz

Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Moonstone

Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.