Reply To: Oldest Gem Design Challenge › Forums › General Discussion › Oldest Gem Design Challenge › Reply To: Oldest Gem Design Challenge August 16, 2020 at 11:00 am #6744 JTheesfeldParticipant @JTheesfeld Available via an open internet search. All 9 Cullinan designs are available in this document, and much more. Historical Texas Faceters Guild project. http://texas-topaz.com/files/diamonds/Diamond_Replica_Project_final.pdf