Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
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Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Diamond
C (Carbon)
mineral
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Yellow Aventurine
Silicon Dioxide (Quartz with inclusions), SiO2
mineral
Arsenopyrite in Sulphide Ore
Arsenopyrite (FeAsS)
mineral
Gold Nugget
Native Gold (Au)
mineral
Silicon
Silicon (Si)
mineral
Milky Quartz with Chlorite/Mica inclusions
Silicon Dioxide (SiO2) with inclusions
mineral
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
sedimentary
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
mineral
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Quartzite (Aventurine type)
Metamorphosed Quartz Sandstone (SiO2 with inclusions)
metamorphic
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
mineral
Bismuth
Bismuth (element Bi) with oxidized thin-film interference layer
mineral
Silicon
Crystalline Silicon (Si)
mineral
Michigan Float Copper
Native Copper (Cu)
mineral
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Gold
Aurum (Au)
Mineral (Metal)
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Arsenopyrite
Arsenopyrite (FeAsS)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
White Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁₈)
mineral
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
mineral