Pietre preziose

Niccolite (Nickeline) Gemstone Introduction Niccolite, also known as nickeline, is a rare and captivating gemstone known for its unique properties and vibrant colors. It is primarily composed of nickel arsenide (NiAs) and is valued for both its industrial applications and metaphysical properties. Niccolite is a reddish semi-precious gemstone with a metallic luster and a hardness of about 5.5 on the Mohs scale....