Turquoise Howlite Gemstone Beads. Howlite is mostly seen as a white to grey colored gemstone with grey, brown or black veins. However, this stone is commonly dyed to imitate Turquoise Howlite. This stone is named after the mineralogist Mr. Henry How of Nova Scotia who discovered Howlite in 1868. This stone is sometimes referred to as 'White Buffalo Stone'. California is the world's primary source of howlite. We carry a variety of shapes and sizes of Turquoise Howlite gemstone beads for your jewelry design needs.