Anthropogenic Mineral Mimic

Red Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - variety Quartzite

Citrine Quartz

Silicon Dioxide (SiO2)

Ironstone Concretion

Ironstone (Limonite/Goethite Concretion)

Quartz Pebble (with Iron Staining)

Crystalline Silicon Dioxide (SiO2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Titanium Aura Quartz (Bismuth-coated Druzy)

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Tumbled Moonstone

Feldspar (Orthoclase/Albite), KAlSi3O8

Pyrite-rich Volcanic Rock

Iron Disulfide (FeS2) in Volcanic Matrix

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Dyed Howlite (Purple)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Howlite (dyed)

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Possible tektite or volcanic glass specimen

Natural silica glass; composition commonly near SiO₂, but exact identification requires chemical testing

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Concrete-like aggregate surface with embedded rock fragments

Anthropogenic concrete or exposed aggregate; not a natural rock specimen

Sandstone (Wonderstone)

Arenite (composed primarily of SiO2 with Fe2O3 impurities)

Faceted Diamond or Cubic Zirconia

Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ

Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)

Silicon Dioxide (SiO2) with various inclusions

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Opalite

Synthetic opalescent glass

Sandstone (Picture Sandstone)

Arenite (primarily SiO2 with iron oxide impurities)

Banded Slag Glass (Leland Blue/Frankfort Green style)

Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)

Green Aventurine

Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Opalite

Synthetic Glass (Simulated Opal)

Red Dyed Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Possible tektite or iron-rich slag-like natural specimen

Uncertain; possibly natural glass (tektite) or magnetite-rich rock

Green Quartzite

Quartzite (primarily SiO2 with trace impurities)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Dendritic Agate or Moss Agate Nodules (Septarian-like)

Chalcedony with mineral inclusions (SiO2)

Iron-stained quartzite or quartz-rich rock

Quartzite, predominantly crystalline SiO₂, with iron-oxide minerals such as hematite and goethite

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Opalite

Synthetic Opalised Glass

Iron-rich slag or weathered ironstone fragments

Probably hematite–goethite material; possibly industrial iron slag (Fe₂O₃/FeO(OH))

Possible basaltic volcanic rock or iron-rich meteorite

Likely basalt (plagioclase–pyroxene rock); meteorite status cannot be confirmed visually

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Diamond

Native Carbon (C)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Red Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye

Banded Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Opalite

Synthetic Opalized Glass