Firstly the meaning of the word fluorite comes from the Latin word ‘fluere’ which means ‘to flow’. This is because fluorite has a very low melting point.
It is a mineral made up of calcium fluoride (CaF₂) and is recognised for its diverse colours which can include purple, green, blue, yellow, and clear, and many specimens may show multiple colours.
It is typically found in sedimentary rocks. On the Mohs scale of mineral hardness, fluorite ranks at 4 making it relatively soft compared to many other minerals.
The most common colours of fluorite are yellow, green, blue, and purple. It can also appear in white, pink, reddish-orange, brown, and even black.
These colours can be bright and vivid, but prolonged exposure to excessive heat or sunlight can cause them to fade.
Some of the most exquisite fluorite can be found in regions of England. Castleton in Derbyshire is renowned for a unique variety of fluorite called Derbyshire Blue John, which is found nowhere else in the world and displays distinct bands of yellow and purple.
Fluorite has a history of being used dating back to ancient Egypt and was also mined by the Romans. The British Museum holds two fluorite cups dating from approximately 50 to 100 AD. Today, Fluorite remains a favourite amongst collectors and has always been one of our firm favourites.
Mandy – RoseAmi