Phenomenal Effects. Fibrous material has chatoyancy that can give pectolite cabochons a cat's eye effect. Larimar cabochon with cat's eye on a crystal base.

How can you tell a fake larimar?

Genuine larimar stones are opaque, cloudy and hazy. Light does not pass through a real larimar stone. Lift the stone up to a light source -- natural light is the best and most accurate one -- and observe if light goes through the stone. If it does, that is an obvious sign that the stone is a fake.

What minerals are in larimar?

Larimar is a type of pectolite or a rock composed largely of pectolite, an acid silicate hydrate of calcium and sodium. Pectolite is found in many locations, but larimar has a unique volcanic blue coloration, which is the result of copper substitution for calcium.