Antropogenic (Man Made Industrial Byproduct)

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.

Likely iron-rich slag or weathered ironstone

Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Industrial Diamond (Bort or Boart)

Diamond (pure Carbon, C)

Polished stone sphere, possibly agate or jasper

Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image

Milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Colorless faceted gemstone, likely quartz

Quartz (SiO₂), tentative identification; the photo is insufficient to confirm the material

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Brown chert (flint)

Microcrystalline quartz (SiO₂), varieties called chert or flint

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Polished greenstone/serpentine pebble (probable)

Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile); possible accessory olivine or chlorite

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Limonite (Iron Ore)

Hydrated ferric oxide mixture (FeO(OH)·nH2O)

Beaded mineral/crystal jewelry (likely turquoise and coral accents)

Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Basalt

Basalt

Tumbled White Quartz

Silicon Dioxide (SiO2)

Iron-rich meteorite candidate

Unclassified stony-iron or iron meteorite; possible weathered ordinary chondrite

Hematite or Goethite-rich Ironstone

Ironstone (Oxidized Iron Ore)

Yellow chalcedony (likely agate) cabochons

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Granite

Granite (plutonic igneous rock)

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

Concretion or weathered iron-rich rock

Likely limonite/goethite-rich concretion; exact identification requires testing

Flint or chert, possibly a knapped stone tool

Microcrystalline quartz (SiO₂), commonly chalcedony with possible carbonaceous impurities

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Likely vesicular basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and sometimes olivine

Vesicular volcanic rock (likely scoria)

Vesicular basaltic-andesite or basalt; exact composition cannot be confirmed visually

Wollastonite

Calcium Inosilicate Mineral, CaSiO3

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Weathered limestone cobble

Limestone, primarily calcite (CaCO₃), possibly fossiliferous or micritic

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Ironstone (possibly Bog Iron or Limonite)

Goethite-rich Ironstone (FeO(OH))

Iron Meteorite (Oxidized)

Iron-Nickel Alloy (Fe, Ni)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Likely iron meteorite or meteorite fragment

Unclassified meteoritic iron–nickel alloy, possibly an iron meteorite

Iron Slag

Anthropogenic Ferro-silicate

Bornite

Bornite (Cu5FeS4)

Specular hematite (iron ore)

Hematite, Fe₂O₃; likely specularite, possibly mixed with magnetite/goethite

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)

Diabase (Dolerite)

Diabase / Dolerite