Not A Rock

Anthracite Coal

Anthracite (a variety of coal, predominantly carbon)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Amber

Succinite (Fossilized Tree Resin)

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Red coral earrings

Corallium rubrum or related precious coral (calcareous coral skeleton; primarily aragonite, CaCO₃)

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Lapis Lazuli

Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Granite, possibly granodiorite

Coarse-grained felsic plutonic rock; chiefly quartz (SiO₂), potassium feldspar and plagioclase feldspar, with biotite and/or hornblende

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Not a rock, mineral, or geological specimen

Note on Image Identification: Textile

N/A (Anthropogenic material)

Schist

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

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

River Rock

Sedimentary Rock (various compositions)

Popcorn

Zea mays everta (P. Wilson) (Botanical name for the corn variety)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Portable Ceramic Space Heater

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

Gneiss

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

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Granite

Granite (a felsic intrusive igneous rock)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Pumice

Pumice (volcanic rock)

N/A - Non-Geological Item

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Abbey Bominable (Monster High character)

Anthropomorphic Yeti / Digital Animation

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

Bauxite Ore

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

Quartz (Druzy) in host rock

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

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Grass (Organic Matter/Soil)

Poaceae (family of monocotyledonous flowering plants)

Pebble

Clast (specifically a granule or small pebble)

Weathered porphyritic basalt

Basalt, likely plagioclase-phyric basalt; primarily a fine-grained aggregate of plagioclase feldspar, clinopyroxene, and possibly olivine or iron-titanium oxides

Lapis Lazuli

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

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)