Gemology › Forums › Gemology 3 topics and 8 replies Last updated by carldowney 1 month, 1 week ago Viewing 3 topics - 1 through 3 (of 3 total) Topic Voices Posts Last Post Any suggestions for scale purchase? 1 1 carldowney 1 month, 1 week ago Gem Information 3 7 Alan Balmer 2 years, 1 month ago Light Physics 3 3 Justin Prim 5 years, 4 months ago Viewing 3 topics - 1 through 3 (of 3 total) You must be logged in to create new topics.