Rock Identifier

Category

Synthetic (Man Made Glass)

Browse synthetic (man made glass) specimens identified by the Rock Identifier community.

Learn about Synthetic (Man Made Glass) in the encyclopedia

Opalite

Goldstone

Zincite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Blue Goldstone

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Obsidian

Tachylite

Map Jasper

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide)

Tumbled pale quartz (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled pale quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Quartzite or Quartz Vein Material (SiO2) — metamorphic

Quartzite or Quartz Vein Material

SiO2

Snowflake Obsidian (Spherulitic Volcanic Glass (primarily SiO2)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2)

Possible iron-rich chert or slag-like rock (Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image) — sedimentary

Possible iron-rich chert or slag-like rock

Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Citrine (Tumbled Quartz) (Silicon Dioxide (SiO2)) — mineral

Citrine (Tumbled Quartz)

Silicon Dioxide (SiO2)

Rounded quartz-rich beach pebble (Likely milky quartz or quartzite (SiO₂)) — mineral

Rounded quartz-rich beach pebble

Likely milky quartz or quartzite (SiO₂)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz/Clear Quartz Cluster (Silicon Dioxide (SiO2)) — mineral

Milky Quartz/Clear Quartz Cluster

Silicon Dioxide (SiO2)

Quartz (Grain/Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Grain/Fragment)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Polished black obsidian pyramid/block (Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)) — igneous

Polished black obsidian pyramid/block

Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz with Iron Oxide (SiO2) — mineral

Quartz with Iron Oxide

SiO2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Green Aventurine (Aventurine Quartz (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2) with Fuchsite inclusions

Quartz (Milky or Citrine-tinted) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Citrine-tinted)

Silicon Dioxide (SiO2)

Quartz Crystal with Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Flint or chert (Microcrystalline quartz (SiO₂), commonly with chalcedony) — sedimentary

Flint or chert

Microcrystalline quartz (SiO₂), commonly with chalcedony

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Smoky or Clear variety with inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Clear variety with inclusions)

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2 with iron impurities)) — gemstone

Amethyst

Silicon Dioxide (SiO2 with iron impurities)

Quartz Pebble (Iron-Stained) (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz Pebble (Iron-Stained)

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble (Chert/Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Chert or flint fragment (Microcrystalline quartz (SiO₂), commonly called chalcedony or flint) — sedimentary

Chert or flint fragment

Microcrystalline quartz (SiO₂), commonly called chalcedony or flint

Pink quartz (likely rose quartz) (Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions) — mineral

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions

Smoky Quartz (Vein Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Muscovite Mica (Muscovite - KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(F,OH)2

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Polished agate/chalcedony fragment (Microcrystalline quartz (SiO₂), likely banded chalcedony or agate) — gemstone

Polished agate/chalcedony fragment

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Amethyst (Rose-tinted variation) (Silicon Dioxide (SiO2) with trace iron impurities) — mineral

Amethyst (Rose-tinted variation)

Silicon Dioxide (SiO2) with trace iron impurities

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Clear Quartz/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky variety on matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Yellow chalcedony (likely lemon quartz or citrine) (Cryptocrystalline silica, SiO₂; possible quartz variety) — mineral

Yellow chalcedony (likely lemon quartz or citrine)

Cryptocrystalline silica, SiO₂; possible quartz variety

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)