Sedimentary (If Natural Jasper) Or Artificial (If Slag)

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Uncertain small metallic-looking mineral/rock fragment

Indeterminate; possibly galena-bearing rock or metallic slag

Asphalt

Asphalt concrete

Red Dyed Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Slag (Industrial Byproduct)

Ferrous/Non-ferrous Silicate

Tumbled dark stone, likely basalt or black jasper

Probable basalt (fine-grained plagioclase–pyroxene rock); exact identification requires testing

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Tumbled brown stone, likely chert or jasper

Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper

Dyed, polished stone—possibly rhodonite or pink jasper

Likely rhodonite (MnSiO₃) or manganese-rich jasper; exact identification requires testing

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Dyed Blue Agate Geode Slice

Chalcedony (Silicon Dioxide, SiO2)

Tumbled River Pebble (Quartzite / Agate)

Silicon Dioxide (SiO2)

Yellow tumbled stone, likely citrine or yellow calcite

Quartz (SiO₂), if citrine; alternatively calcite (CaCO₃)

Peacock Ore (Treated Chalcopyrite)

Copper Iron Sulfide (CuFeS2) coated with oxides

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Dyed and Metallic Coated Agate Geode

Silicon Dioxide (SiO2) with titanium/gold vapor deposition coating

Dyed Agate

Silicon Dioxide with artificial pigment (SiO2)

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Iron-rich sandstone or lateritic rock

Ferruginous sandstone; predominantly quartz (SiO₂) cemented or stained by iron oxides/hydroxides

Peridot

Olivine (Mg, Fe)2SiO4

Banded Slag Glass (Leland Blue/Frankfort Green style)

Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)

Blue-green slag glass or chalcedony-like material

Likely industrial glassy slag; exact identification requires testing

Blue Howlite (Dyed)

Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)

Dyed Agate

SiO2

Conglomeratic gravel / pebble-rich concrete-like rock

Polymictic conglomerate (likely an unconsolidated gravel surface; exact identification uncertain from the image)

Worry Stone

Weathered Quartzite or Sandstone

Prasiolite (Green Quartz)

Silicon Dioxide (SiO2) with iron impurities

Polished/tumbled septarian nodule (likely)

Calcite–aragonite–barite septarian concretion; composition varies, commonly calcite (CaCO₃) with clay/mudstone and iron oxides

Painted Garden Rock (likely Granite or Limestone base)

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial purple dye

Asphalt (Bituminous Rock)

Natural bitumen or Bituminous limestone/sandstone

Slag

Metallurgical Slag

Iron-stained chert or jasper

Microcrystalline quartz (SiO₂), likely limonite/goethite stained

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Blue Onyx (Dyed Agate)

Cryptocrystalline Quartz (SiO2) with artificial pigment

Tumbled brown jasper or iron-rich chert

Microcrystalline quartz (SiO₂), likely limonite/goethite-stained

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Red Painted Rock

Artificial Coated Lithic Fragment

Tumbled goldstone-like quartz pebble

Likely iron-stained quartz or jasper; exact identification requires testing

Brown chalcedony (likely carnelian/iron-stained quartz)

Microcrystalline quartz, SiO₂; brown coloration from iron oxides/hydroxides