As its name suggest, this is a definitive fluorite with all those flowing lines that match the image to the name.
Fluorite is "the most colourful mineral in the world", often purple, blue, green and yellow, and derives from the Latin noun fluo meaning a flow of water.
It occurs globally, including Derbyshire Blue John fluorite, and in 1852 fluorite gave its name to the phenomenon of fluorescence. Industrially, fluorite is used as a flux for smelting producing certain glasses and enamels.
Most importantly, it makes for a wonderful scarf for all occasions.