Recent work on zircon
Journal Article
Anderson, B.W. (1937) Recent work on zircon. The Gemmologist, Vol. 7, No. 75, October, p. 97, 99, 101, 103.
Sinkankas/Born No.: NIS/NIB | RWHL*
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gems, zircon, Cambodia, heat treatment, Indochina, Vietnam, Thailand, blue zircon