Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Category
Browse synthetic (ceramic) specimens identified by the Rock Identifier community.
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Bismuth
Bismuth (Bi)
Rutilated Quartz
SiO2 with TiO2 inclusions (Rutile)
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Sapphire
Corundum (Al2O3)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Wood Beads (Palmwood/Ebony)
Various species for wood, but often refers to woods like Palmwood (e.g., Borassus flabellifer) or Ebony (Diospyros spp.) for their distinctive grain and hardness.
Quartz (possibly milky quartz or quartz with inclusions)
SiO2 (Silicon Dioxide)
Moonstone
Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Aquamarine
Aquamarine (Beryl variety); Be3Al2Si6O18
Diamond (Rough)
Diamond (Carbon, C)
Ruby
Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
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.
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Blue Tiger's Eye
Riebeckite (crocidolite variety)
Quartz
Silicon Dioxide (SiO₂)
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Bowling Ball (Brunswick T-Zone Deep Space)
Polyester resin / Polyurethane polymer
Pyrite
Iron Pyrite (FeS2)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
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))
Pyrite
Pyrite (FeS2)
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Rutilated Quartz
Quartz (SiO2) with Rutile inclusions (TiO2)
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Diamond
Diamond (pure carbon; C)