Lava Boulders With the wide collection of natural colors in our boulders—which ranges from warm earthy tones to peaceful grays—you may design an aesthetically striking outdoor area. Our variety of boulder colors can help you create an eye-catching focal point in your landscape or improve the curb appeal of your home. Now is the time to start looking for the ideal large landscaping rocks to give your surroundings a hint of elegance found in nature.