The Hardness of Emerald

Book

Ringsrud, R. (2025) The Hardness of Emerald. Campbell, CA, Green View Press, 283 pp.

ISBN/ISSN: 9781650000000 | Sinkankas/Born No.: NIS/NIB | RWHL*

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gems, beryl, emerald, Colombia

Autobiography of emerald dealer Ron Ringsrud, detailing his adventures in the emerald business, particularly in Colombia.