Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Category
Man Made Object (Ring)
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Diamond
Native Carbon (C)
mineral
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
mineral
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Yellow Chalcedony (Yellow Agate)
Silicon Dioxide (SiO2)
gemstone
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
mineraloid
Blue Obsidian
Volcanic Glass (SiO2 with inclusions)
igneous
Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Polished ocean jasper / orbicular jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions
mineral
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Petrified Wood
Silicified wood (SiO2)
fossil
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Hematite
Iron(III) oxide (Fe2O3)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Black Onyx
Chalcedony (SiO2)
gemstone
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Pearl (Biogenic Mineraloid)
Calcium carbonate (CaCO3) primarily as Aragonite
mineral
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Carborundum
Silicon Carbide (SiC)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Unidentified Small Rock
Unknown
undetermined
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary