Howlite in Depth
The white stone with gray veins
Howlite is a calcium borosilicate hydroxide, first described in Nova Scotia in 1868 by Henry How, a chemist and geologist who was investigating why a gypsum quarry kept hitting a hard white nodule that was ruining the work. It forms as irregular white nodules in borate deposits, and the gray or black veining running through it is the surrounding host rock.
California, particularly the borate deposits around Death Valley, is the main commercial source. Howlite is soft at around 3.5 on Mohs and quite porous, which is exactly the property that made it commercially important in a way its discoverer would not have predicted.
Why so much fake turquoise is howlite
Howlite's porosity means it takes dye completely and evenly, and its natural veining looks remarkably like turquoise matrix once the white body is dyed blue. The result is sold as turquenite, white turquoise, or simply as turquoise by sellers who should know better. Dyed red and green howlite show up as coral and jade substitutes too.
Two ways to catch it. First, price and size: large, evenly colored, cheap blue beads are almost never turquoise. Second, scratch resistance. Howlite at 3.5 is much softer than turquoise at 5 to 6, and a discreet test on a hidden surface separates them. Dyed howlite can also bleed color onto a damp white cloth.
Care
Being soft and porous, howlite scratches easily and absorbs whatever it touches: oils, lotions, perfume. Water is best avoided beyond a quick wipe, since soaking can discolor natural white pieces and will pull dye out of colored ones. Skip salt, acids, ultrasonic cleaners, and heat.
Store it separately from harder stones and clean it with a dry or barely damp cloth. Dry methods work best for cleansing: smoke, sound, moonlight, or a rest on selenite. White howlite kept near a kitchen or a bathroom will gradually go dingy and there is not much you can do to reverse it.
What it is used for
Howlite's association is with stilling a busy head, particularly at night, and with cooling anger before it gets said out loud. It is one of the most commonly suggested stones for keeping under a pillow, partly because it is inexpensive and easy to replace.
Gemini is the usual sign pairing, with Virgo also cited, and it works at the crown with a secondary third eye link. It is often described as a blank stone that takes whatever intention you give it, which is part of why it gets dyed so readily. It combines with amethyst and lepidolite for rest, and with selenite for a bright all-white bedside arrangement. Both howlite and selenite are soft, so keep that pair away from anything harder.