Conglomerate
Lithified, poorly sorted gravel and sand; exact mineral composition is not identifiable from the image
sedimentary
Category
Sedimentary (Man Made Conglomerate)
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
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Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Polished black pebble, likely basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Conglomerate (pebble conglomerate)
Clastic sedimentary rock composed of rounded gravel-sized clasts in a finer matrix
sedimentary
Conglomerate (pebble conglomerate)
Clastic conglomerate; quartz- and feldspar-rich clasts in a dark, iron-stained matrix
sedimentary
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Opalite
Synthetic Opalised Glass
mineral
Asphalt concrete
Anthropogenic conglomerate
sedimentary
Puddingstone
Polymictic Conglomerate
sedimentary
Puddingstone
Conglomerate (Indurated)
sedimentary
Conglomerate
Clast-supported polymict conglomerate
sedimentary
Conglomerate
Conglomeratic Sandstone
sedimentary
Conglomerate
Conglomerate (SiO2 primary clasts with lithic matrix)
sedimentary
Opalite (a synthetic glass)
Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant
Mineral Simulant (Synthetic Glass)
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Conglomerate
Polymictic Conglomerate
sedimentary
Conglomerate
Polymictic Conglomerate
sedimentary
Conglomerate
Polymictic Conglomerate
sedimentary
Conglomerate
Conglomeratic Sandstone
sedimentary
Conglomerate
Conglomeratic Sandstone
sedimentary
Conglomerate
Quartz Conglomerate
sedimentary
Conglomerate
Conglomerate Rock
sedimentary
Conglomerate
Conglomerate Rock
sedimentary
Conglomerate
Polymictic Conglomerate
sedimentary
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Libyan Desert Glass
Libyan Desert Glass (SiO2 with trace elements)
mineral (impactite)
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Conglomerate
Polymictic, matrix-supported conglomerate
sedimentary
Conglomerate
Clastic conglomerate (rounded pebble- to cobble-sized clasts in a finer matrix)
sedimentary
Conglomerate
Polymictic clast-supported conglomerate
sedimentary
Conglomerate
Polymictic conglomerate; clast-bearing sedimentary rock cemented by silica, calcite, or iron oxides
sedimentary
Conglomerate
Clast-supported polymictic conglomerate
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with varying clasts)
sedimentary
Conglomerate
Polymictic clast-supported conglomerate, likely carbonate-rich
sedimentary
Conglomerate
Conglomerative Rudite (SiO2/CaCO3 matrix)
sedimentary
Conglomerate
Clastic Conglomerate (Lithic-rich)
sedimentary
Conglomerate
Conglomerate (Rock composed predominantly of rounded clasts > 2mm)
sedimentary
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Sea Glass (specifically Frosted White)
Amorphous Silica (substance: Sodium-calcium silicate glass)
Mineraloid (Anthropogenic/Man-made rock)
Blue glassy gemstone cabochon, likely dyed chalcedony or glass
Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)
gemstone