Mineral With Artificial Coating

Sandstone Pebble

Arenite (SiO2 dominated with iron oxide)

Quartz Druzy Geode

Silicon Dioxide (SiO2)

Porphyritic Igneous Rock with Iron Oxide Weathering

Weathered Porphyry (containing Quartz, Feldspar, Amphibole/Biotite, and Hematite/Limonite)

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial purple dye

Dyed Pink Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye additives

Likely weathered ironstone or iron-stained sandstone fragment

Ferruginous sandstone/ironstone, chiefly quartz (SiO₂) with iron oxides such as hematite and goethite

Weathered limestone pebble

Limestone, chiefly calcite (CaCO₃)

Quartz (Smoky/Druzy variety)

Silicon Dioxide (SiO2)

Druzy Quartz on Sandstone

Silicon Dioxide (SiO2) with Quartz crystals

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chrysocolla-rich copper ore

Chrysocolla (hydrated copper aluminosilicate), likely with malachite and limonite/goethite

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Weathered iron-rich stone, possibly limonite-bearing rock

Limonite/goethite mixture (hydrated iron oxides), identification uncertain from image

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Sandstone (Red Sandstone)

Arenite (predominantly SiO2 with Fe2O3 cement)

Sandstone (Red)

Arenite (SiO2 with Fe2O3)

Dyed tumbled stone, likely chalcedony or quartz

Microcrystalline quartz (SiO₂), probably dyed magenta

Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate / Chalcedony

Likely weathered quartz-bearing rock

Probably quartz-rich pegmatite or altered feldspathic rock; exact identification is uncertain from the image

Quartz (Druzy)

Silicon Dioxide (SiO2)

Tumbled blue stone, likely blue aventurine or dyed chalcedony

Aventurine quartz (SiO₂) or chalcedony (microcrystalline SiO₂); exact identification requires testing

Tumbled blue chalcedony (likely blue quartz)

Chalcedony, cryptocrystalline SiO₂; possibly chrysoprase or dyed quartz

Tumbled smoky quartz (probable)

Quartz, SiO₂; smoky variety colored by irradiation-related defects

Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Botryoidal hematite–goethite specimen

Hematite (Fe₂O₃) with goethite (FeO(OH)), possibly minor manganese oxides

Rounded gray river pebble, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; exact identification requires testing

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)

Tumbled banded gneiss or amphibolite

Banded metamorphic rock, likely quartz–feldspar–biotite gneiss with amphibole

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Sea Glass

Amorphous silicon dioxide (glass)

Polished granite pebble

Granite; chiefly quartz, feldspar, and mica/amphibole

Dyed Howlite (Dyed Red)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Red Sandstone

Arenite (primarily Quartz SiO₂ with Hematite Fe₂O₃ staining)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Limonite (Hydrated Iron Oxide / Bog Iron)

FeO(OH)·nH2O

Metallic sulfide mineral fragment, likely bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂)

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4