Man Made Object (Metalwork)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Diamond

Carbon (C)

Rough Diamond

Native Carbon (C)

Diamond (in a cluster setting)

Crystallized Carbon (C)

Likely gray-green soapstone (steatite) fragment

Steatite, a talc-rich rock; chiefly talc, Mg₃Si₄O₁₀(OH)₂

Amethyst quartz cluster

Quartz, SiO₂; purple coloration from trace iron and irradiation

Polished banded jasper (likely ocean jasper or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron oxides and assorted silicate inclusions

Desert rose

Gypsum rosette (selenite), CaSO₄·2H₂O

Polished black stone, likely basalt or black jasper

Basalt (fine-grained plagioclase–pyroxene rock) or microcrystalline quartz (black jasper); exact identification requires testing

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Beach Pebble (likely Quartz or Chalcedony)

Silicon Dioxide (SiO2)

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Corundum (Sapphire/Ruby in Matrix)

Corundum (Al2O3)

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Diamond

Diamond (pure native carbon, C)

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Faience and Carnelian in Egyptian Revival Jewelry

Faience (quartz frit) and Carnelian (chalcedony, SiO2)

Black granite with pink feldspar

Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende

Polished pyrite nodule (likely)

Pyrite, FeS₂

Fluorescent glassy mineral specimen, possibly hyalite opal

Hyalite (hydrated amorphous silica, SiO₂·nH₂O), tentative

Weathered polymictic gravel/conglomeratic rock

Polymictic conglomerate or poorly lithified alluvial gravel; chiefly quartz, feldspar, mica, and dark lithic fragments

Anthracite coal

Anthracite; predominantly carbon (C), with minor macerals, ash, sulfur, and trace minerals

Tumbled purple chalcedony (likely grape agate)

Chalcedony, cryptocrystalline quartz (SiO₂), with purple manganese-bearing inclusions

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Lepidolite Polished Point

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Coquina

Bioclastic Limestone

Coquina

Bioclastic Limestone

Grey Chalcedony

Silicon Dioxide (SiO2)

Diamond (as featured in jewelry)

Diamond (C - pure carbon)

Note on Image Identification: Textile

N/A (Anthropogenic material)

Yellow chalcedony (likely tumbled quartz)

Chalcedony, microcrystalline quartz (SiO₂), colored by iron impurities

Likely quartz crystal sphere

Quartz (silicon dioxide, SiO₂), possibly included or coated quartz

Polished serpentine or green jasper pebble

Likely serpentine-group silicate, chiefly antigorite/lizardite; possibly iron-rich jasper

Tumbled blue-green stone, likely serpentine or green jasper

Probable serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or microcrystalline quartz (SiO₂); exact identification requires testing

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Iron-stained quartzite pebble

Quartzite, composed predominantly of SiO₂ (quartz), with iron-oxide staining

Turquoise (likely stabilized or simulated Howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Basalt

Basalt

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Weathered sandstone pebble

Sandstone, likely quartz-rich (arkose or quartz arenite)

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)