Green Diamond Resource Company offers a variety of coastal timberlands. It is a privately held company that operates California Timberlands Division and Northwest Timberlands Division. The company supports the Sustainable Forestry Initiative program. Green Diamond Resource Company works in collaboration with various organizations and provides natural resource-based educational opportunities. It also administers several forest and wildlife management programs. The company maintains lumber manufacturing facilities. Green Diamond Resource Company donates to charitable organizations. It operates a wholly owned subsidiary, California Redwood Company.