Graphene & Solar Technologies Limited, together with its subsidiary, manufactures critical materials for the solar and semiconductor markets in the United States and Australia. It engages in the production of solar and semiconductor grade quartz sand; development of silicon wafer manufacturing facilities; and development of green silicon metal smelter, as well as polysilicon production plant. The company was formerly known as Solar Quartz Technologies Corporation and changed its name to Graphene & Solar Technologies Limited in September 2018. Graphene & Solar Technologies Limited was incorporated in 2010 and is based in Phoenix, Arizona.