I'm no expert, but if you have no idea how to wear them, some easy tips to follow by are:
1. letting the necklace stand out against solid colors for a clean cut look
2. wear simple jewelry on your arms or ears if you're going to wear a statement necklace
3. wear a top or dress with a simple necklace that doesn't conflict with the necklace.
(Also, in these examples, I'm wearing the exact same necklace to further show the different styles.)
In these first couple of examples, pairing it with neutrals is the easiest way to go.
Another way to wear bright statement necklaces is matching it with colors in the same family as the necklace:
annabelle from vivaluxury
jean from extra petite blog
The last way is matching with complementary colors, to form the perfect color block.
k is for kani
(Thanks for reading;)