Quartz-Veined Mudstone
Argillaceous Mudstone with Quartz Veining
sedimentary
Category
Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)
Browse sedimentary rock (technically a microcrystalline quartz mineral aggregate) specimens identified by the Rock Identifier community.
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Likely tumbled yellow jasper or iron-rich chert
Microcrystalline quartz (SiO₂), colored by iron oxides
mineral
Small brown quartz-rich pebble, possibly chert or jasper
Microcrystalline quartz (SiO₂), tentative
mineral
Ocean Jasper
Orbicular Quartz (SiO2)
Mineral
River Rock
Sedimentary clast
sedimentary
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Brecciated jasper
Chalcedony–quartz aggregate, predominantly SiO₂, with iron-oxide coloring
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Tree Agate (Dendritic Agate/Quartz)
Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions
mineral
Polished agate geode
Chalcedony (microcrystalline SiO₂), commonly banded agate with drusy quartz and possible iron-oxide inclusions
mineral
Iron-stained jasper (likely orbicular/brecciated jasper)
Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides
mineral
Kambaba Jasper
Stromatolite (Fossilized Algae within Microcrystalline Quartz)
sedimentary
Dragon Blood Jasper
Epidote and Pietersite-rich Quartz (SiO2 with inclusions)
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Tumbled red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Tree Agate
Silicon Dioxide (SiO2) with Chlorite/Manganese inclusions
sedimentary
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Brecciated jasper
Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia
sedimentary
Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Chert Arrowhead
Cryptocrystalline microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
mineral
Jasper Pebble
SiO2 (Microcrystalline Quartz)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Yellow jasper (likely iron-rich chert)
Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides
sedimentary
Likely weathered quartz-bearing rock fragment
Provisional identification: quartz-rich sandstone or microcrystalline quartz (SiO₂)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silica (SiO2)
sedimentary
Chert (Mookaite Jasper style)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Chert with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Chalcedony (possibly agate or common quartz)
Microcrystalline quartz, SiO₂
mineral
Zebra Jasper
Silicon dioxide (microcrystalline quartz), SiO2
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Geode
Quartz / Chalcedony nodule
sedimentary
Jasper Agate (specifically Brecciated Jasper with Agate inclusions)
Silicon Dioxide (SiO2)
mineral
Quartzite and Sandstone Pebbles
Silicon dioxide (SiO2)
metamorphic and sedimentary
Generic Pebble / Small Rock Fragment
Lithic fragment / Weathered rock particle
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary