Rock Identifier

Category

Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)

Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz) in the encyclopedia

Chalcedony

Blue Chalcedony

Blue Chalcedony

Black Onyx

Prase

Landscape Agate

Landscape Agate

Tube Agate

Carnelian

Feather Agate

Sweetwater Agate

Sweetwater Agate

Honey Agate

Cathedral Agate

Cathedral Agate

Cloud Agate

Agate (SiO2 (Silicon dioxide, cryptocrystalline quartz)) — mineral

Agate

SiO2 (Silicon dioxide, cryptocrystalline quartz)

Flint with Chalk Cortex (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Flint with Chalk Cortex

Chert (Microcrystalline Quartz, SiO2)

Chrysoprase (Nickel-bearing Chalcedony (SiO2 with inclusions of Ni-compounds like kerolite or pimelite)) — mineral

Chrysoprase

Nickel-bearing Chalcedony (SiO2 with inclusions of Ni-compounds like kerolite or pimelite)

Quartz (Milky/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Agate (specifically Moss or Plume Agate nodding toward Agatized Wood) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz (Chalcedony)) — mineral

Agate (specifically Moss or Plume Agate nodding toward Agatized Wood)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz (Chalcedony)

Polished carnelian/chalcedony agate (Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloring) — mineral

Polished carnelian/chalcedony agate

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloring

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite or Limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Quartz Pebbles and Agates (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles and Agates

Silicon Dioxide (SiO2)

Milky Quartz or Moonstone (Silicon Dioxide (SiO2) or Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Milky Quartz or Moonstone

Silicon Dioxide (SiO2) or Potassium Aluminum Silicate (KAlSi3O8)

Picture Jasper (SiO2) — Mineral/Sedimentary

Picture Jasper

SiO2

Mineral/Sedimentary

Blue Chalcedony (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony (Tumbled)

Silicon Dioxide (SiO2)

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Green Chalcedony (likely Chrysoprase or Green Onyx) (Silicon Dioxide (SiO2) with trace nickel or chromium inclusions) — mineral

Green Chalcedony (likely Chrysoprase or Green Onyx)

Silicon Dioxide (SiO2) with trace nickel or chromium inclusions

Carnelian (Red Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2)

Strawberry Quartz (Quartz (SiO2) with inclusions of Goethite or Hematite) — Mineral

Strawberry Quartz

Quartz (SiO2) with inclusions of Goethite or Hematite

Carnelian (orange-red chalcedony) (Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety) — gemstone

Carnelian (orange-red chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety

Carnelian (Carnelian (Cryptocrystalline Quartz, SiO2)) — mineral

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Chalcedony (Common Opal variant or Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Tumbled carnelian/chalcedony (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony) — mineral

Tumbled carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Tumbled blue chalcedony (likely agate or common opal) (Microcrystalline quartz, SiO₂; possibly hydrated silica opal, SiO₂·nH₂O) — mineral

Tumbled blue chalcedony (likely agate or common opal)

Microcrystalline quartz, SiO₂; possibly hydrated silica opal, SiO₂·nH₂O

Chert (or Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (or Chalcedony)

Microcrystalline Quartz (SiO2)

Carnelian (SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony) — mineral

Carnelian

SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides.) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides.

Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Blue Lace Agate (Silicon Dioxide (SiO₂), a variety of Chalcedony) — mineral

Blue Lace Agate

Silicon Dioxide (SiO₂), a variety of Chalcedony

Chert (Iron-stained) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Iron-stained)

Chert (Microcrystalline Quartz, SiO2)

Chert (Sedimentary cryptocrystalline quartz (SiO2)) — sedimentary

Chert

Sedimentary cryptocrystalline quartz (SiO2)

Agate and Chalcedony Assortment (Silicon Dioxide (SiO2)) — mineral

Agate and Chalcedony Assortment

Silicon Dioxide (SiO2)

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions

Polished blue chalcedony or glass-like quartz specimen (Chalcedony (microcrystalline SiO₂), possibly treated or synthetic; exact identification requires testing) — gemstone

Polished blue chalcedony or glass-like quartz specimen

Chalcedony (microcrystalline SiO₂), possibly treated or synthetic; exact identification requires testing

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant) (Silicon Dioxide (SiO2) with various inclusions) — sedimentary

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)

Silicon Dioxide (SiO2) with various inclusions

Blue Lace Agate (Polished Point) (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate (Polished Point)

Silicon Dioxide (SiO2)

Chert (specifically Jasper) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Agate (Silicon Dioxide (SiO2) - Chalcedony variant) — mineral

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Polished agate fragment (Chalcedony (microcrystalline quartz, SiO₂), likely brecciated or banded agate) — mineral

Polished agate fragment

Chalcedony (microcrystalline quartz, SiO₂), likely brecciated or banded agate

Agate (Plume/Moss variety) (Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions) — mineral

Agate (Plume/Moss variety)

Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

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

Flint

SiO2 (Cryptocrystalline Quartz / Chert)

Chalcedony Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)