Company description Formerly Bluestone Global Tech (BGT), established in 2011, the company is involved in mass production of high-quality graphene. Products Grat-Film Large-area graphene films, as large as 24 in x 300 in, and single-crystal graphene with a domain size as large as 200 micrometers. Grat-PowerTM An advanced battery anode product, Grat-PowerTM SiGP, offers performance