Join in a conversation between friends and colleagues as Richard Hughes interviews the legendary microscopist, author, and photographer John Koivula. John was honored with the AGA Antonio C. Bonanno Award for Excellence in Gemology in 2002.
Join in a conversation between friends and colleagues as Richard Hughes interviews the legendary microscopist, author, and photographer John Koivula. John was honored with the AGA Antonio C. Bonanno Award for Excellence in Gemology in 2002.