Posted by the opal guys on September 12, 2000 at 12:14:12:
In Reply to: Russian Lab Grown Opals posted by Elena on September 07, 2000 at 20:48:17:
do you know much about these russian opals in paticular can they be incased in bora-silicate(pyrex) if so i can be of some assistance. please get back to me. robert