Diamond (appearing as a jewelry centerpiece)
Diamond (Formula: C)
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Diamond (appearing as a jewelry centerpiece)
Diamond (Formula: C)
Lapis Lazuli
Lapis Lazuli (Complex aggregate including Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Bismuth
Bismuth (Bi)
Lapis Lazuli (in Matrix)
Na8[Al6Si6O24]S2 (Lazurite as the primary component)
Sapphire
Corundum (Al2O3)
Ring with an Orange Inlay
N/A (Man-made object)
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Rutilated Quartz
SiO2 with TiO2 inclusions (Rutile)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Diamond (Heart Cut)
Carbon (C)
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Azurite-Malachite (often a mixed specimen)
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.
Diamond (Rough)
Diamond (Carbon, C)
Moonstone
Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Aquamarine
Aquamarine (Beryl variety); Be3Al2Si6O18
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Ruby
Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Blue Tiger's Eye
Riebeckite (crocidolite variety)
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Sapphire
Corundum (Al₂O₃) with trace elements causing color variations.
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Rutilated Quartz
Quartz (SiO2) with Rutile inclusions (TiO2)
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
Emerald
Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V