Mixed tumbled gemstone collection
Varied minerals, likely including amethyst, sodalite/lapis lazuli, quartzite or aventurine, jasper, and agate/chalcedony
gemstone
Category
Organic Gemstone (Not A Rock Or Mineral)
Browse organic gemstone (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Rock Or Mineral) in the encyclopedia
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Garnet in Matrix
Almandine/Grossular Garnet in Pegmatite or Schist
mineral
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy / Crystalline)
Silicon Dioxide (SiO2)
mineral
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8)
mineral
Raw Quartz
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement) SiO2
sedimentary
Amber
Succinite (C10H16O)
Mineraloid (Organic)
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Milky quartz with dark mineral veins
Quartz, silicon dioxide (SiO₂), likely massive vein quartz; dark veins may be chlorite, mica, iron/manganese oxides, or a sulfide mineral
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Boulder Opal
Hydrated amorphous silica (SiO2·nH2O) in ironstone matrix
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
sedimentary
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Moss-covered Rock Fragment
Weathered Rock Fragment with Epilithic Growth
sedimentary
Fossilized Bone Fragment
Vertebrate Fossil Material (Apatite/Calcium Phosphate)
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Polished brown mineral or rock fragment
Indeterminate from image; possibly iron-stained quartz, jasper, or a polished sulfide-bearing specimen
mineral
Red Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Amethyst Cluster
Silicon Dioxide (SiO2 with iron impurities)
mineral
Orange Calcite (or Yellow Calcite)
Calcium Carbonate (CaCO3)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Vesicular basalt (scoria-like basalt fragment)
Basalt; primarily plagioclase, pyroxene, and commonly olivine, with small vesicles
igneous
Red Jasper
Quartz (SiO2) with iron oxide inclusions
sedimentary
Chert / River Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Paleoxylon (SiO2)
fossil
Ammonite Fossil (Small Pyritized or Calcitized Internal Mold)
Ammonoidea
sedimentary
Quartz (Milky/Yellowish variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral