Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Category
Mineral (Man Enhanced)
Browse mineral (man enhanced) specimens identified by the Rock Identifier community.
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Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral
Bornite
Cu5FeS4 (Copper Iron Sulfide)
mineral
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Quartz (likely milky quartz or quartz glass-like fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Polished dendritic agate or jasper
Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites
mineral
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Polished brown agate (likely sardonyx/chalcedony)
Microcrystalline quartz, SiO₂; brown chalcedony with possible iron-oxide staining
mineral
Tumbled jasper and agate specimens
Microcrystalline quartz (chalcedony), chiefly SiO₂, with iron-oxide and other mineral impurities
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety Carnelian (Chalcedony)
Mineral
Dragon Vein Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Libyan Desert Glass
Libyan Desert Glass (SiO2 with trace elements)
mineral (impactite)
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Polished opalite (likely man-made opalescent glass)
Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Diamond
Native Carbon (C)
mineral
Pink Dyed Agate Geode Slice
Silicon Dioxide (SiO2) with artificial pigment
mineral
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Goldstone (likely red/brown aventurine glass)
Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)
mineral
Blue goldstone
Man-made aventurine glass containing metallic copper particles; not a natural mineral
mineral
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Tumbled opalite (likely man-made glass)
Opalite, a trade name for opalescent glass; not natural opal
mineral
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Agate (Polished Slice)
Banded Chalcedony (SiO2)
mineral
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (likely quartz crystal fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Hematite Beads
Hematite (Fe2O3)
Mineral
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Diamond
Cubic carbon (C)
mineral
Opalite (likely man-made opalescent glass)
Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)
mineral