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Paulo M. Vasconcelos, Hans-Rudolf Wenk, and George R. Rossman
The Indaia Sapphire Deposits of Minas Gerais, Brazil
David S. Epstein, Warren Brennan, and Julio C. Mendes
Flux-Induced Fingerprint Patterns in Synthetic Ruby: An Update
K. Schmetzer and F.-J. Schupp
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