Rock Identifier

Category

Sedimentary (Man Made Composite)

Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Man Made Composite) in the encyclopedia

Opalite

Map Jasper

Conglomerate

Goldstone

Quartzite Sandstone

Quartzite Sandstone

Breccia

Blue Goldstone

Ironstone

Sea Sediment Jasper

Limestone

Claystone

Sandstone

$Faceted clear gemstone, likely quartz or glass imitation (Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests) — gemstone$

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Clear quartz crystal (likely) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Polished dendritic agate or jasper (Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites) — mineral

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites

Clear quartz tumbled stone (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Aura Quartz (Titanium-coated Silicon Dioxide (SiO2)) — mineral

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Ferrochrome Slag (Anthropogenic slag (Fe-Cr alloy waste)) — industrial byproduct

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

industrial byproduct

Goldstone (Red) (Aventurine Glass (Cupriferous glass)) — Synthetic Glass (Man-made)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Synthetic Glass (Man-made)

Fluorite (Polished Point/Tower) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Possible obsidian or slag glass (Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag) — igneous

Possible obsidian or slag glass

Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag

Hematite Beads (Hematite (Fe2O3)) — Mineral

Hematite Beads

Hematite (Fe2O3)

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper) (Quartz variety (SiO2) / Polycrystalline Quartz Aggregate) — mineral

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Cubic Zirconia (Simulated Diamond) (Cubic Zirconia (ZrO2)) — mineral

Cubic Zirconia (Simulated Diamond)

Cubic Zirconia (ZrO2)

Opalite (Synthetic Opalized Glass) — mineraloid (man-made)

Opalite

Synthetic Opalized Glass

mineraloid (man-made)

Blue Glass or Slag Glass (Amorphous Silica (Anthropogenic Glass)) — mineral

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Asphalt (Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)) — Sedimentary

Asphalt

Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)

Blue-dyed tumbled quartz or glass imitation (Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image) — mineral

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Blue Goldstone (Man-made glass with suspended copper, cobalt, or manganese particles) — man-made glass

Blue Goldstone

Man-made glass with suspended copper, cobalt, or manganese particles

Polished black stone, likely black obsidian (Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition) — igneous

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

Pink Tumbled Quartz (Dyed) (Silicon Dioxide (SiO2)) — mineral

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Dyed Crackle Quartz (Green) (Quenching-treated Quartz (Silicon Dioxide, SiO2)) — mineral

Dyed Crackle Quartz (Green)

Quenching-treated Quartz (Silicon Dioxide, SiO2)

Black glassy fragment, likely obsidian or industrial glass (Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image) — mineral

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

Goldstone (Brown/Gold variety) (Aventurine Glass (SiO2 with Copper inclusions)) — Synthetic/Man-made glass (often mistaken for a mineral)

Goldstone (Brown/Gold variety)

Aventurine Glass (SiO2 with Copper inclusions)

Synthetic/Man-made glass (often mistaken for a mineral)

Sea Glass (Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature) — mineral

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Milky quartz (likely quartz crystal fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Blue Goldstone (Goldstone (artificial glass)) — Mineral (man-made glass, not natural)

Blue Goldstone

Goldstone (artificial glass)

Mineral (man-made glass, not natural)

Slag Glass (SiO2 (Silicon Dioxide) with impurities) — man-made glass

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Opalite (Synthetic Glass, SiO2 base with metallic inclusions) — mineraloid (synthetic)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

mineraloid (synthetic)

Jasper and Mudstone Composite (Silicified Sedimentary Rock / Jasperoid Pebble) — sedimentary

Jasper and Mudstone Composite

Silicified Sedimentary Rock / Jasperoid Pebble

Black Obsidian (Amorphous volcanic glass (SiO2 + impurities)) — igneous

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Aura Quartz (Titanium/Gold coated) (Silicon Dioxide (SiO2) with metallic vapor deposition) — mineral

Aura Quartz (Titanium/Gold coated)

Silicon Dioxide (SiO2) with metallic vapor deposition

Polished white chalcedony or quartz pendant (Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image) — gemstone

Polished white chalcedony or quartz pendant

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Iron Slag (Iron/Steel Slag (Ferrosilicate Glass)) — industrial byproduct (anthropogenic material)

Iron Slag

Iron/Steel Slag (Ferrosilicate Glass)

industrial byproduct (anthropogenic material)

Iron Slag (Industrial Byproduct) (Anthropogenic Vitrification Product/Ferrous Slag) — Mineral-like Industrial Smelting Waste

Iron Slag (Industrial Byproduct)

Anthropogenic Vitrification Product/Ferrous Slag

Mineral-like Industrial Smelting Waste

Polished black stone, likely obsidian (Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)) — igneous

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Green obsidian (likely molded or heat-treated glass-like specimen) (Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)) — igneous

Green obsidian (likely molded or heat-treated glass-like specimen)

Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)

Pet Rock (Man-made Quartzite or Granite Cobble) (Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica) — igneous or metamorphic (base stone); anthropogenic (decoration)

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica

igneous or metamorphic (base stone); anthropogenic (decoration)

Blue opal heart cabochon (Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite) — gemstone

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Slag (Industrial Glass/Glassy Rock) (Anthropogenic Vitreous Material) — igneous

Slag (Industrial Glass/Glassy Rock)

Anthropogenic Vitreous Material

Sea Glass (White/Clear) (Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO) — Anthropogenic (Man-made product subject to geological processes)

Sea Glass (White/Clear)

Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO

Anthropogenic (Man-made product subject to geological processes)

Aura Quartz (Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)) — mineral

Aura Quartz

Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)

Red Slag Glass (Amorphous Silica (Industrial byproduct with metallic oxide dopants)) — Mineraloid / Industrial Byproduct

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Mineraloid / Industrial Byproduct

Metal Alloy (Likely Pewter or Sterling Silver) (Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).) — Man-made material (metal)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Man-made material (metal)