Interesting GIA article, for any who have not yet seen it.
"Natural Shell Blisters and Blister Pearls: What’s the Difference?"
https://www.gia.edu/gia-news-research/natural-shell-blisters-and-blister-pearls?
Interesting GIA article, for any who have not yet seen it.
"Natural Shell Blisters and Blister Pearls: What’s the Difference?"
https://www.gia.edu/gia-news-research/natural-shell-blisters-and-blister-pearls?
Thank you. Interesting read.
Thank you for sharing too. An interesting and sometimes complex topic. Good to see some guidelines to refer to available in the public domain.