7. All The Colours In One
courtesy of: pinterest.com
If you don’t want to stick to just a specific colour, opals of all kinds are your best bet. Choose the fire or black opal types, or even take a look at the more discrete moonstones, these gems are great addition to any jewelry box. Just hold the agains natural light and you will see what we meant by that, leaving you with a mesmerizing dance of all the colours of the rainbow.