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

Chalcedony Pebble (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Polished agate (likely chalcedony) (Microcrystalline quartz, SiO₂; agate is banded chalcedony) — mineral

Polished agate (likely chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Chalcedony (Agate/Carnelian pebbles) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Carnelian pebbles)

Cryptocrystalline Quartz (SiO2)

Polished smoky quartz or brown chalcedony pebble (Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions) — mineral

Polished smoky quartz or brown chalcedony pebble

Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions

Chalcedony Pebble (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Tumbled jasper (Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities) — mineral

Tumbled jasper

Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities

Tumbled orange-and-white chalcedony (Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian/white agate variety) — mineral

Tumbled orange-and-white chalcedony

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian/white agate variety

Quartz pebble (Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz pebble (Agate / Chalcedony)

Silicon Dioxide (SiO2)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Yellow Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Yellow Chalcedony

Cryptocrystalline Quartz (SiO2)

Geode (Quartz / Chalcedony nodule) — sedimentary

Geode

Quartz / Chalcedony nodule

Polished banded agate (Banded chalcedony, microcrystalline quartz (SiO₂)) — mineral

Polished banded agate

Banded chalcedony, microcrystalline quartz (SiO₂)

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)) — Mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

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

Chert (or Jasper)

Microcrystalline Quartz (SiO2)

Tumbled agate/chalcedony (Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions) — mineral

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions

Tumbled chalcedony or agate pebble (Microcrystalline quartz (SiO₂), likely chalcedony with possible iron-oxide inclusions) — mineral

Tumbled chalcedony or agate pebble

Microcrystalline quartz (SiO₂), likely chalcedony with possible iron-oxide inclusions

Yellow Jasper (Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Moss Agate (Moss Agate (a variety of Chalcedony, SiO

₂)) — Mineral (specifically a variety of Chalcedony, which is microcrystalline Quartz)

Moss Agate

Moss Agate (a variety of Chalcedony, SiO ₂)

Mineral (specifically a variety of Chalcedony, which is microcrystalline Quartz)

Yellow Agate (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Yellow Agate

Silicon Dioxide (Chalcedony variety), SiO2

Green agate (polished bead) (Chalcedony, microcrystalline quartz (SiO₂)) — gemstone

Green agate (polished bead)

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled carnelian (likely) (Cryptocrystalline quartz, SiO₂; reddish chalcedony colored mainly by iron oxides) — gemstone

Tumbled carnelian (likely)

Cryptocrystalline quartz, SiO₂; reddish chalcedony colored mainly by iron oxides

Tumbled brown agate (probable) (Microcrystalline quartz, SiO₂ (chalcedony/agate)) — mineral

Tumbled brown agate (probable)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled chalcedony (likely agate or jasper) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Tumbled yellow chalcedony (likely honey agate or yellow quartz) (Microcrystalline quartz, SiO₂; coloration likely from iron oxides or included minerals) — mineral

Tumbled yellow chalcedony (likely honey agate or yellow quartz)

Microcrystalline quartz, SiO₂; coloration likely from iron oxides or included minerals

Red-and-blue jasper (likely ocean jasper or dyed/polished jasper) (Microcrystalline quartz, chiefly SiO₂; jasper is an opaque chalcedony variety colored by iron oxides and other impurities) — mineral

Red-and-blue jasper (likely ocean jasper or dyed/polished jasper)

Microcrystalline quartz, chiefly SiO₂; jasper is an opaque chalcedony variety colored by iron oxides and other impurities

Chalcedony (probably agate or common quartz) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (probably agate or common quartz)

Microcrystalline quartz, SiO₂

Polished orbicular jasper (likely ocean jasper) (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and volcanic-mineral inclusions) — mineral

Polished orbicular jasper (likely ocean jasper)

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and volcanic-mineral inclusions

Red Jasper (Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)) — sedimentary

Red Jasper

Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)

Chalcedony on Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony on Matrix

Silicon Dioxide (SiO2)

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

Chert / Jasper

Microcrystalline Quartz (SiO2)

Yellow-orange chalcedony (possibly carnelian) (Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides) — mineral

Yellow-orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides

Polished ocean jasper (orbicular jasper) (Silicified rhyolite, composed mainly of microcrystalline quartz (SiO₂)) — mineral

Polished ocean jasper (orbicular jasper)

Silicified rhyolite, composed mainly of microcrystalline quartz (SiO₂)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Red jasper (Microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red jasper

Microcrystalline quartz (SiO₂), colored mainly by iron oxides

Polished brecciated jasper pebble (Microcrystalline quartz (SiO₂), with iron-oxide inclusions) — mineral

Polished brecciated jasper pebble

Microcrystalline quartz (SiO₂), with iron-oxide inclusions

Tumbled yellow-orange chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; iron-bearing variety commonly called carnelian) — mineral

Tumbled yellow-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly called carnelian

Polished brecciated jasper (Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions) — mineral

Polished brecciated jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Green agate/geode slab (Cryptocrystalline quartz (chalcedony), SiO₂, likely agate with druzy quartz) — mineral

Green agate/geode slab

Cryptocrystalline quartz (chalcedony), SiO₂, likely agate with druzy quartz

Chalcedony (likely common gray chalcedony) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (likely common gray chalcedony)

Microcrystalline quartz, SiO₂

Agate (Chalcedony) (Cryptocrystalline Quartz (SiO2)) — mineral

Agate (Chalcedony)

Cryptocrystalline Quartz (SiO2)

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

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions