Howlite is an absorbent white mineral that can be dyed in almost any color imaginable.Howlite is a gemstone with a mineral composition of earthy calcium borosilicate. The chemical formula of howlite is Ca2SiB5O9(OH)5
Howlite is an absorbent white mineral that can be dyed in almost any color imaginable.Howlite is a gemstone with a mineral composition of earthy calcium borosilicate. The chemical formula of howlite is Ca2SiB5O9(OH)5