by Donchis » Sep 30, 2016 For over a decade, my family and I have always trusted Martin Sheffield with all our diamond purchases. I had the pleasure of working with Martin Sheffield once again when I was looking for my engagement diamond stone. Martin was extremelely patient and answered all my questions and concerns. He always responded to my calls and emails immediately. He is so knowledgeable and a true professional and master in his craft. Martin was able to find me a beautiful stone that fits within my budget. I wanted to Thank you again for all your help and guidance. You've made the whole purchasing process seamless. I would recommend you in a heartbeat to all my love ones, friends, and family members without hesitation!