Hi Caitlin,
Thank you for your message. I sell pearls as well as the set of necklaces, pendants, earrings, bracelets and ring. I also sell few other products which were decorated with pearls, such has hair clip, scarf, purse, brooch.

I haven't started the online business yet, as currently i'm surveying other websites to get ideas and study their marketing way. I'm still very new to this online business and I think online customers are more careful and particular such a small thing like the authentication/certification/grading of the pearls. I don't have formal education in gemmology but I do know a bit how to grade pearls traditionally based on the appearance especially the blemishing level of pearls. In my country, there is no an institution for examining, certifying pearls like GIA or Mikimoto. We, the sellers explained the grade/quality of the pearls verbally to customer based on our experience/knowledge. Even tourists also never ask about the certificate, maybe because they know we're running a traditional basis business.

But recently, I'm studying deeper on how to define the roundness more accurate based on exact measurement (using vernier caliper) and vary percentage in size andd types of shape. So, can I grade the pearls quality myself with the help of some experts/experience people without getting any certification from such kind institution and then sell them online? Will customer still inquire the certicate? Thank you.