Description | Lazulite, a magnesium-iron-aluminum-phosphate hydroxide, is a relatively rare mineral that gets easily confused with other, more well known, blue minerals. Not only does its name sound like the silicate mineral lazurite, it has a similar color. It is also similar in appearance to azurite, a carbonate mineral. The beautiful azure-blue color of all three of these minerals makes them very desirable as ornamental stones. They may be difficult to distinguish, but azurite is softer than the others and reacts to acids. Lazurite forms infrequent and different crystals than lazulite. This sample is 11 cm across. |