BLUSTN BLUE VARIG 18X18 INSIDE 18 x 18 2" Variegated Bluestone Blue Inside Corner Coping Bullnose can be very versatile and can be ordered in a variety of widths, thicknesses and surface textures. Typically comes in a blue-gray color but it is also available in a variety of colors that includes more earthy tones. This type of coping comes with a thermal top and thermal edging.