Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
igneous
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
Learn about Manufactured Glass in the encyclopedia
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Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Weathered limestone pebble
Limestone, chiefly calcite (CaCO₃)
sedimentary
Dragon Vein Agate
Silicon Dioxide (SiO2)
mineral
Polished tiger iron
Tiger iron; interlayered hematite, jasper, and crocidolite-quartz (often riebeckite)
metamorphic
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Mineraloid
Likely small metallic meteorite fragments
Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image
meteorite
Gold (10K Alloy)
Aurum (Au) with alloying metals (Cu, Ag, Zn)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Carbonate Beach Sand
Biogenic Carbonate Sediment (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Sandstone
Quartz Arenite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone Cobble
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Massive Quartz
Silicon dioxide (SiO2)
mineral
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass