Minerals, Free Full-Text
e-Rocks Mineral Auctions
Spinel - Wikipedia
Spinel Gemstone
13 Gemmy Facts About Spinel - The Overlooked Gem
File:Pyrrhotite-Spinel-t08-03a.jpg - Wikimedia Commons
Gem-A spotlights Demantoid, Spinel and Corundum in latest edition
Spinel Presentation By Tyler Kotsifas. - ppt download
Chemical classification diagrams (see Gargiulo et al. 2013) for the
Spinel gemstone information
Spinel: Mineral information, data and localities.
14 Mineral Descriptions – Mineralogy
Pakistan's Gemstones, Minerals: An Overview – Gandhara Gems
Spinel Mineral Specimen For Sale