TI: Chicken-blood stone from China.
AU: Wang-Fuquan; Guo-Jingfeng
SO: Gems-and-Gemology. 25. (3). p. 168-170.
4 Refs.
YR: 1989
PD: illus.

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TI: The growth of Brazil-twinned synthetic quartz and the potential for synthetic amethyst twinned on the Brazil law.
AU: Koivula-John-I; Fritsch-Emmanuel
SO: Gems-and-Gemology. 25. (3). p. 159-164.
17 Refs.
YR: 1989
PD: illus.