Mineral With Artificial Coating

Dyed agate slice

Microcrystalline quartz (SiO₂), typically banded chalcedony

Dyed tumbled quartz (likely quartzite or quartz crystal)

Quartz, silicon dioxide (SiO₂)

Dyed tumbled stone, likely chalcedony or quartz

Microcrystalline quartz (SiO₂), probably dyed magenta

Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate / Chalcedony

Dyed Agate

Silicon dioxide, SiO2

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Tumbled quartz-rich stone, possibly druzy quartz or chalcedony

Quartz/chalcedony (SiO₂); exact identification is uncertain from the photograph

Quartz with Iron Oxide

Silicon Dioxide (SiO2) with Fe2O3

Likely native metallic mineral specimen

Uncertain from photograph; possibly pyrite (FeS₂) or a sulfide-rich metallic ore

Dyed Alum or Dyed Quartz (Ornamental Crystal)

Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]

Sandstone with Manganese Oxide Patina

Clastic Sedimentary Rock (primarily SiO2)

Blue-green tumbled stone, possibly chrysocolla-bearing material

Uncertain from image; likely chrysocolla (hydrated copper silicate, variably written Cu₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with quartz or other copper minerals

Quartz (massive milky quartz)

Quartz, silicon dioxide (SiO₂)

Small dark pebble, possibly basalt or iron-rich stone

Undetermined; image alone cannot confirm composition

Brown chert or jasper pebble

Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chert/jasper

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Dyed Blue Agate

Chalcedony (Silicon Dioxide / SiO2)

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Fossilized tooth, likely mammalian molar

Silicified or mineral-replaced mammalian tooth; exact taxon cannot be determined from the image

Iron-stained quartz with limonite/goethite coating

Quartz (SiO₂) with iron oxyhydroxides, chiefly goethite (α-FeO(OH)) and/or limonite

Iron-stained quartz vein rock

Quartz (SiO₂), with likely iron-oxide staining

Amethyst druzy geode slice

Quartz, SiO₂, purple variety (amethyst), with likely chalcedony/banded agate

Amethyst druzy quartz

Quartz, SiO₂; purple variety colored mainly by iron-related defects

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Unidentified polished mineral fragment

Likely quartz-bearing stone; exact identification is impossible from the blurred photograph

Druzy Quartz Geode (Vug)

Silicon Dioxide (SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Tumbled blue-green stone, likely chrysocolla-bearing material

Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; identification is provisional from the photograph

Limonite on Sandstone

Iron Oxyhydroxide (FeO(OH)·nH2O) on Quartz Sandstone

Hag Stone (Quartz Pebble with Natural Hole)

Quartz (Silicon Dioxide - SiO2)

Likely polished blue-green gemstone

Indeterminate from image; possibilities include sapphire (corundum, Al₂O₃), aquamarine (beryl, Be₃Al₂Si₆O₁₈), or blue-green tourmaline

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

Dyed Agate

SiO2

Druzy agate/geode fragment

Chalcedony (microcrystalline SiO₂) with a druzy quartz center

Iron-stained quartz pebble

Quartz (SiO₂), with iron-oxide staining and possible minor host-rock inclusions

Polished labradorite cabochons

Labradorite, calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Quartz with Epidote

Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Iron-stained quartz with limonite/goethite

Quartz (SiO₂) with iron oxyhydroxides, commonly goethite (α-FeO(OH)) and limonite

Quartz-rich rock fragment

Likely iron-stained milky quartz, predominantly silicon dioxide (SiO₂); precise rock identification is uncertain from the image