Rock Identifier

Category

Mineraloid (Cryptocrystalline Quartz)

Browse mineraloid (cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Mineraloid (Cryptocrystalline Quartz) in the encyclopedia

Chalcedony

Black Onyx

Landscape Agate

Landscape Agate

Tube Agate

Sweetwater Agate

Sweetwater Agate

Frost Agate

Coldwater Agate

Honey Agate

Zebra Agate

Flame Agate

Feather Agate

Cathedral Agate

Cathedral Agate

Chert (often called Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Cryptocrystalline Quartz (SiO2)

Chert (varietal: Flint Pitted Pebble) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (varietal: Flint Pitted Pebble)

Cryptocrystalline Quartz (SiO2)

Agate (Chert/Chalcedony) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Agate (Chert/Chalcedony)

Cryptocrystalline Quartz (SiO2)

Blue Lace Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Lace Agate

Cryptocrystalline Quartz (SiO2)

Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

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

Chert / Flint Nodules

Cryptocrystalline Quartz (SiO2)

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

Chert (specifically Flint)

Cryptocrystalline Quartz (SiO2)

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

Chert / Flint Pebble

Cryptocrystalline Quartz (SiO2)

Agate Geode (Cryptocrystalline Quartz (SiO2)) — mineral

Agate Geode

Cryptocrystalline Quartz (SiO2)

Carnelian (Cryptocrystalline Quartz (SiO2)) — mineral

Carnelian

Cryptocrystalline Quartz (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

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

Agate (Chalcedony slice)

Cryptocrystalline Quartz (SiO2)

Gray Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Gray Agate

Cryptocrystalline Quartz (SiO2)

Lake Superior Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Lake Superior Agate

Cryptocrystalline Quartz (SiO2)

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

Chert (and Flint)

Cryptocrystalline Quartz (SiO2)

Agate (Cryptocrystalline quartz (SiO2)) — mineral

Agate

Cryptocrystalline quartz (SiO2)

Chert (specifically Jasper or Flint variant) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper or Flint variant)

Cryptocrystalline Quartz (SiO2)

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

Chert / Jasper

Cryptocrystalline Quartz (SiO2)

Purple Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Purple Banded Agate

Cryptocrystalline Quartz (SiO2)

Rough Agate/Chert Nodules (Cryptocrystalline Quartz (SiO2)) — sedimentary

Rough Agate/Chert Nodules

Cryptocrystalline Quartz (SiO2)

Red Jasper Concretion (Cryptocrystalline Quartz (SiO2)) — sedimentary

Red Jasper Concretion

Cryptocrystalline Quartz (SiO2)

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

Dendritic Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Jasper variant) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Cryptocrystalline Quartz (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Agate Geode (Cryptocrystalline Quartz (SiO2)) — mineral

Agate Geode

Cryptocrystalline Quartz (SiO2)

Gray Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Gray Agate

Cryptocrystalline Quartz (SiO2)

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

Flint (or Chert)

Cryptocrystalline Quartz (SiO2)

Banded Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Cryptocrystalline Quartz (SiO2)

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

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Blue chalcedony (likely dyed or coated) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

Likely polished/tumbled quartz-rich specimen (Quartz, silicon dioxide (SiO₂), possibly an agate or chalcedony variety) — mineral

Likely polished/tumbled quartz-rich specimen

Quartz, silicon dioxide (SiO₂), possibly an agate or chalcedony variety

Dyed Agate (SiO2) — Mineral

Dyed Agate

SiO2

Tumbled chalcedony or quartz (Microcrystalline silica, SiO₂ (likely chalcedony; possibly milky quartz)) — mineral

Tumbled chalcedony or quartz

Microcrystalline silica, SiO₂ (likely chalcedony; possibly milky quartz)

Tumbled yellow chalcedony (likely citrine or yellow jasper) (Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony) — mineral

Tumbled yellow chalcedony (likely citrine or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony

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 chalcedony or quartz fragment (Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)) — mineral

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Yellow Chalcedony (or Yellow Jasper / Agate) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (or Yellow Jasper / Agate)

Silicon Dioxide (SiO2)

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

Chalcedony (Agate / Quartz Pebble)

Silicon Dioxide (SiO2)

Likely tumbled jasper or iron-rich chert (Microcrystalline quartz (SiO₂), possibly colored by iron oxides) — mineral

Likely tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), possibly colored by iron oxides