Spinel
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- Bulletin 30, Gem Stone Resources of South Carolina
- Gemstone Firing Guide
- GEMSTONES of PAKISTAN: EMERALD, RUBY, and SPINEL by E
- Thermodynamic Modelling of Fe-Cr-Ni- Spinel Formation at the Light-Water Reactor Conditions
- Colored Stones Identification Chart for Presidium Gem Indicator
- Summer 2010 Gems & Gemology
- Red Ruby Or Pink Sapphire, That's the Question
- 2010 Minerals Yearbook
- Primary Spinel + Chlorite Inclusions in Mantle Garnet Formed at Ultrahigh-Pressure
- Volume 34 / No. 5 / 2015
- Flux-Grown Synthetic Blue and Red Spinels from Russia
- Characterization and Grading of Natural-Color Pink Diamonds
- A Cobalt-Rich Spinel Inclusion in a Sapphire from Bo Ploi, Thailand
- New Rubies from the Morogoro Area, Tanzania
- Hs-Rings-Catalog.Pdf
- HK Spinel-Print
- Volume 36/ No. 5/ 2019
- Summer 1993 Gems & Gemology