Watermelon tourmaline is a variety of colour-zoned tourmaline. Its red interiors and green exteriors are distinct from typical tourmaline.
All coloured Tourmaline gems change colour when viewed at different angles. In some gems, this effect is hardly noticeable, while in others, it’s stunningly apparent. Gemstone cutters must take this into account when cutting a Tourmaline so that the finished gem brings out its best colour.
What does watermelon tourmaline look like?
As the name suggests, watermelon tourmaline displays banded colours that resemble a ripe slice of watermelon. The red or pink centre is surrounded by a rim of green, often separated by a sliver of pale pink or white. The brightly coloured zones can also occur at either end of the gem, although there is some debate about whether these stones should be classified as simply bi-colour tourmalines.
Read the full story HERE