Howlite was discovered in Nova Scotia by Henry How. This gem is easily recognized by its grey, black or brown veins within opaque white stone. Howlite is a porous and inexpensive gem, which makes it an great candidate for dying. It is often dyed to resemble turquoise or lapis lazuli. Some alternative healers believe it to decrease stress and encourage restful sleep, it is also often known as "Tranquility Stone".