gemstone
Aquamarine in Onyx / Blue Topaz Pendant
Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)
Hardness: 7.5-8 (Aquamarine) or 8 (Topaz); Color: Light blue center stone inlaid in dark black backing; Luster: Vitreous; Crystal Structure: Hexagonal or Orthorhombic
- Hardness
- 7
- Color
- Light blue center stone inlaid in dark black backing
- Luster
- Vitreous
Identified More gemstone →
Explore Aquamarine in Onyx / Blue Topaz Pendant in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7.5-8 (Aquamarine) or 8 (Topaz); Color: Light blue center stone inlaid in dark black backing; Luster: Vitreous; Crystal Structure: Hexagonal or Orthorhombic
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through hydrothermal and magmatic processes.
Uses & applications
Fine jewelry, gemstone collecting, fashion accessories.
Geological facts
Blue gemstones like aquamarine and topaz have been prized for centuries. Aquamarine gets its sea-blue color from trace amounts of iron (Fe2+ and Fe3+) within its crystal lattice.
Field identification & locations
Identify by its light blue coloration, high transparency, hardness, and vitreous luster set within a decorative jewelry mounting.
More like this
Other gemstone specimens
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone
Black Opal Ring (Carved Opal)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (or possibly Diamond)
Zirconium dioxide (or Carbon)
gemstone