Graphene is a next generation modular cryptocurrency platform designed to be community driven, secure, flexible, and scalable while maintaining decentralization. This blockchain architecture makes use of sharding technology and the Casper consensus protocol and has been developed using the modern programming language ‘Go’. 
The token was released on the Binance Smart Chain on October 11th, 2021 as it was airdropped to holders of the previous cryptocurrency project developed by the same team, Phore, which was released in 2017. 

Graphene Whitepaper