Catalina Cove Green Boulders Central California quarry producing a wide range of materials from DG fines to very large boulders. Materials are shipped bulked 18 to 24 throughout Southern and Central California and smaller amounts on pallets anywhere requested. Have you ever been to Catalina Island? Do you remember the beautiful blue-green ocean waters along shorelines? Well take a step back into memory lane of traveling along the shoreline of Santa Catalina Island with these rich ocean green landscape boulders. Catalina Cove Boulders often arrive more grey-green than true green. The minerals in the rock will oxidize in the sunlight over time and the whole rock will turn to a true light to medium green color.