Spinel Supergroup: Mineral information, data and localities.
Galaxite: Mineral information, data and localities.
Spinel Gem Guide and Properties Chart
Spinel gemstone information
Spinel - Wikipedia
Spinel cluster - MUN16-37 - Pein Pyit - Burma Mineral Specimen
Spinel: The mineral Spinel information and pictures
Spinel: The mineral Spinel information and pictures
Spinel Gemstone
Spinel - Wikipedia
Spinel mineral information and data
Spinel R050259 - RRUFF Database: Raman, X-ray, Infrared, and Chemistry
Spinel gemstone information
Gem Localities and Formation
e-Rocks Mineral Auctions