Tourmaline and opal are the birthstones for October, both extremely colourful in very different ways.
Opal’s shifting play of kaleidoscopic colours is unlike any other gem, and writers have compared it to volcanoes, galaxies, and fireworks.
Tourmalines have a variety of exciting colours with one of the widest colour ranges of any gem. Traces of iron, and possibly titanium, induce green and blue colours, while manganese produces reds and pinks, and possibly yellows.
Tourmaline is up there in my top two favourite gems ♥