6-cobalt-crys-overfire-1080-810 Zinc silicate crystalline cobalt detail following 8 hour crystal growth cycle. Post navigationPrevious post: Cobalt Crystalline Footed Bowl Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ