Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Category
Anthropogenic (Man Made Industrial Byproduct)
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Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
man-made glass mineral simulant
Goldstone (Red)
Aventurine Glass
Man-made material (Simulated Mineral)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Quartz
Silicon dioxide (SiO₂)
Mineral
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Man-made material (Anthro-lithic product)
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.
Man-made Material (jewelry, metal alloy)
Likely iron-rich slag or weathered ironstone
Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag
mineral
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
mineral
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Tumbled White Quartz
Silicon Dioxide (SiO2)
mineral
Hematite or Goethite-rich Ironstone
Ironstone (Oxidized Iron Ore)
sedimentary
Likely vesicular basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and sometimes olivine
igneous
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Basalt
Basalt
igneous
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Granite
Granite (plutonic igneous rock)
igneous
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Ironstone (possibly Bog Iron or Limonite)
Goethite-rich Ironstone (FeO(OH))
sedimentary
Iron Meteorite (Oxidized)
Iron-Nickel Alloy (Fe, Ni)
meteorite
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Bornite
Bornite (Cu5FeS4)
mineral
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
mineral
Fossilized echinoid (sea urchin), likely a flint/chalk-associated test
Echinoid fossil; likely a regular echinoid such as Echinocidaris or related taxon, composed mainly of recrystallized calcite (CaCO₃)
fossil
Diabase (Dolerite)
Diabase / Dolerite
igneous
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Green glassy slag or manufactured glass bead
Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral
mineral
Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)
fossil
Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)
Silicon Dioxide (SiO2) with impurities
mineral
Likely quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Iron Meteorite / Limonite-coated Meteorite / Iron Nodule
Iron-Nickel Alloy (Kamacite and Taenite) with weathering crust
meteorite
Sandstone
Arenite
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Obsidian (Black)
Obsidian (High-silica volcanic glass)
igneous