Caymanite has a color of white to red and black and it is Poorly soluble in dilute HCl, which means Hydrochloric acid or muriatic acid, a colorless inorganic chemical system that has a distinctively pungent smell.
white to red and black Poorly soluble in dilute HCl Hydrochloric acid or muriatic acid is a colorless inorganic chemical system with the formula HCl. Hydrochloric acid has a distinctive pungent smell. 
