What is neptunite?

Neptunite is a rare mineral belonging to the eudialyte group. It was first discovered in 1893 in California, USA, and was named after the planet Neptune due to its deep blue color. Neptunite is typically found in association with other minerals such as natrolite, benitoite, and joaquinite.

Neptunite has a distinctive deep blue to black color with a vitreous luster. It is commonly found in crystal form, with elongated prismatic crystals that are often striated. Neptunite is a brittle mineral with a Mohs hardness of 5-6.

Neptunite is highly sought after by collectors due to its rarity and beautiful color. It is often used in jewelry as a gemstone or as a collector's specimen. Neptunite is found in a few locations around the world, including California, Russia, Italy, and Greenland.

Overall, neptunite is a valuable and unique mineral that is prized for its striking appearance and rarity.