Rock Identifier

Category

Microcrystalline Quartz

Browse microcrystalline quartz specimens identified by the Rock Identifier community.

Learn about Microcrystalline Quartz in the encyclopedia

Chalcedony

Chert

Brown Jasper

Flower Jasper

Red Jasper

Feather Jasper

Royal Imperial Jasper

Scenic Jasper

Carrasite Jasper

Map Jasper

Dendritic Jasper

Sonoran Sunset Jasper

Agate (Cryptocrystalline quartz (SiO2)) — mineral

Agate

Cryptocrystalline quartz (SiO2)

Onyx (Chalcedony (SiO2)) — mineral

Onyx

Chalcedony (SiO2)

Gray Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Gray Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Red Jasper (Microcrystalline quartz, SiO2) — sedimentary

Red Jasper

Microcrystalline quartz, SiO2

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

Brown Jasper / Chert

Microcrystalline Quartz (SiO2)

Chert / Flint (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline quartz (SiO2)

Polished orbicular jasper (possibly ocean jasper) (Orbicular jasper, a microcrystalline quartz variety (SiO₂); exact variety cannot be confirmed from the photo) — mineral

Polished orbicular jasper (possibly ocean jasper)

Orbicular jasper, a microcrystalline quartz variety (SiO₂); exact variety cannot be confirmed from the photo

Flint (Chert (SiO2)) — sedimentary

Flint

Chert (SiO2)

Agate Geode (Silicon Dioxide (Chalcedony / Quartz), SiO2) — sedimentary

Agate Geode

Silicon Dioxide (Chalcedony / Quartz), SiO2

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

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

Flint

SiO2 (Microcrystalline Quartz / Chert)

Polished red stone, possibly dyed agate or jasper (Unidentified silica-rich material; potentially chalcedony (SiO₂)) — mineral

Polished red stone, possibly dyed agate or jasper

Unidentified silica-rich material; potentially chalcedony (SiO₂)

Tumbled chalcedony (possibly agate) (Microcrystalline quartz, SiO₂ (chalcedony); banding is not clearly visible to confirm agate) — mineral

Tumbled chalcedony (possibly agate)

Microcrystalline quartz, SiO₂ (chalcedony); banding is not clearly visible to confirm agate

Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Dalmatian Jasper (Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions) — igneous

Dalmatian Jasper

Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Carnelian (Agate) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Agate)

Silicon Dioxide (SiO2)

Red jasper pebbles (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides) — mineral

Red jasper pebbles

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

Brown tumbled stone, possibly jasper (Uncertain from the image; likely iron-rich microcrystalline quartz (SiO₂), commonly called jasper) — mineral

Brown tumbled stone, possibly jasper

Uncertain from the image; likely iron-rich microcrystalline quartz (SiO₂), commonly called jasper

Brecciated jasper (Iron-oxide-rich jasper (microcrystalline quartz, SiO₂), cut by a quartz- or calcite-rich vein) — metamorphic

Brecciated jasper

Iron-oxide-rich jasper (microcrystalline quartz, SiO₂), cut by a quartz- or calcite-rich vein

Tumbled jasper (likely brecciated or red jasper) (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Tumbled jasper (likely brecciated or red jasper)

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

Polished carnelian (likely) (Carnelian, a reddish-orange cryptocrystalline quartz variety; SiO₂) — gemstone

Polished carnelian (likely)

Carnelian, a reddish-orange cryptocrystalline quartz variety; SiO₂

Polished banded jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities) — metamorphic

Polished banded jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Iron-rich chert or jasper (Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing) — sedimentary

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing

Iron-stained jasper/chert fragment (Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing jasper) — sedimentary

Iron-stained jasper/chert fragment

Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing jasper

Brecciated jasper (Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia) — sedimentary

Brecciated jasper

Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia

Polished orange agate or chalcedony (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate) — mineral

Polished orange agate or chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate

Jasper with Quartz Vein (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper with Quartz Vein

Microcrystalline Quartz (SiO2)

Chert (Flint) (SiO2 (Microcrystalline Quartz)) — sedimentary

Chert (Flint)

SiO2 (Microcrystalline Quartz)

Chert (possibly jasper-bearing chert) (Microcrystalline quartz (SiO₂); chert, with iron-oxide staining) — sedimentary

Chert (possibly jasper-bearing chert)

Microcrystalline quartz (SiO₂); chert, with iron-oxide staining

Leopard Skin Rhyolite / Spherulitic Rhyolite (Extrusive igneous rock with quartz and feldspar spherulites) — igneous

Leopard Skin Rhyolite / Spherulitic Rhyolite

Extrusive igneous rock with quartz and feldspar spherulites

Tumbled dark reddish-brown stone, possibly red jasper (Jasper, microcrystalline quartz (SiO₂), likely iron-oxide colored) — mineral

Tumbled dark reddish-brown stone, possibly red jasper

Jasper, microcrystalline quartz (SiO₂), likely iron-oxide colored

Weathered quartz-rich river stone (Chert or silicified limestone/quartzite; exact identification requires testing) — sedimentary

Weathered quartz-rich river stone

Chert or silicified limestone/quartzite; exact identification requires testing

Weathered chert or flint fragment (Microcrystalline quartz (SiO₂), likely chalcedonic chert with iron-oxide staining) — sedimentary

Weathered chert or flint fragment

Microcrystalline quartz (SiO₂), likely chalcedonic chert with iron-oxide staining

Quartz Pebble (Beach Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Beach Chalcedony)

Silicon Dioxide (SiO2)

Tumbled jasper or iron-rich chert (Microcrystalline quartz (SiO₂), likely colored by iron oxides) — mineral

Tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), likely colored by iron oxides

Red Jasper (CHERT (SiO2) with Hematite impurities) — sedimentary

Red Jasper

CHERT (SiO2) with Hematite impurities

Breciated Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Flint Arrowhead (Cryptocrystalline quartz (Chert/Flint, SiO2)) — sedimentary

Flint Arrowhead

Cryptocrystalline quartz (Chert/Flint, SiO2)

Small brown chert (flint) fragment (Microcrystalline quartz, SiO₂) — sedimentary

Small brown chert (flint) fragment

Microcrystalline quartz, SiO₂

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

Chert / Flint Arrowheads

Cryptocrystalline Quartz (SiO2)