Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Category
Igneous (Man Made
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N/A - Non-Geological Item
not a rock/mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Unidentifiable Rock Fragment
Uncertain
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Lava Rock with Fabric Impression
Scoria or Basalt with anthropogenic impressions
igneous
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Diamond
Native Carbon (C)
mineral
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Diamond
Native Carbon (C)
gemstone
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Not a geological specimen
N/A (man-made object)
N/A
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Not a rock, mineral, or geological specimen
N/A
Crackle Agate / Dyed Quartz
SiO2 (Silicon Dioxide)
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
mineral
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Diamond (or Simulant)
Carbon (C)
gemstone
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Sea Glass
Silicon dioxide (mostly)
mineral
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Likely tumbled or cut quartz/chalcedony fragment
Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz
mineral
White quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Slag
Metallurgical Slag
igneous
Obsidian (Blue)
Volcanic Glass (SiO2)
igneous
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary