Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
sedimentary
Category
Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
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Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Likely tumbled calcite or pale limestone fragment
Calcite (CaCO₃), possibly microcrystalline limestone
mineral
River Pebble (Gravel)
Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)
sedimentary
Pebble / Gravel
Clastic Sedimentary Specimen (likely Limestone or Quartzite base)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Rhyolitic Matrix
igneous
Quartzite with Quartz Vein
SiO2 (Metamorphosed Quartz Sandstone)
metamorphic
Gneiss with Quartz Vein
Gneiss (containing SiO2 vein)
metamorphic
Quartz (Smoky/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Tumbled pale quartz/chalcedony fragment
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Quartz (in matrix)
Quartz (SiO₂)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) with host rock (often Schist or Basalt)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
sedimentary
Red Jasper (possibly with Quartz or Hematite)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary or metamorphic
Jasper with Quartz Veining
Microcrystalline quartz (SiO2) with iron oxide impurities
sedimentary
Mixed river gravel (alluvial conglomeratic sediment)
Polymictic alluvium; composition includes quartz, feldspar, chert, granite, basalt, and metamorphic rock fragments
sedimentary
Chert with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Wishing Stone with Quartz Vein
Quartz-veined sedimentary pebble
sedimentary
Basalt with Quartz Vein
Basalt (extrusive igneous rock) with Quartz (SiO2) inclusion
igneous
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz Vein in Mica Schist
Quartz (SiO2) with Muscovite/Biotite Schist
metamorphic
Sandstone (Quartz Arenite)
Sandstone (SiO2 with possible mineral cements)
sedimentary
Quartz (possibly milky quartz)
Quartz (Silica; SiO₂)
Mineral
Wishing Stone (Graywacke with Quartz Vein)
Graywacke Sandstone containing a Quartz (SiO2) intrusion
sedimentary
Polished ocean jasper / brecciated jasper
Jasper, microcrystalline quartz (SiO₂), with iron-oxide and other silicate inclusions
mineral
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Basalt with Quartz Vein
Basalt (SiO2 vein inclusion)
igneous
Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
sedimentary
Quartz vein fragments on Sandstone cobble
SiO2 (Silicon Dioxide)
mineral
Red jasper (likely iron-rich chert)
Microcrystalline quartz (SiO₂), colored by hematite/goethite; possibly brecciated jasper
sedimentary
Assorted Beach Rocks and Pebbles
Various (Granite, Basalt, Quartz, Conglomerate, etc.)
igneous, sedimentary, metamorphic
Chert with Quartz/Calcite Vein
Microcrystalline Silica (SiO2)
sedimentary
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic