Majestic Pr

year of pub­li­ca­ti­onISBNauthor(s)title
1993978-0-9625311-3-2Paul B. DowningOpal Adventures
  ''978-0-9625311-4-9Paul B. DowningOpal Cutting Made Easy (Jewelry Crafts)
2001978-0-9625311-5-6   ''Opal: Advanced Cutting & Setting
2002978-0-9625311-8-7   ''Opal Identification & Value