Depends on the occasion you want to go. For example, if it a party, a silver jewelry set or simple white pearl will be more beautiful Like These:
Vintage Imitation Pearl Crystal Jewelry Sets | Buy From Here[1]
YIKALAISI Natural Freshwater Pearl Jewelry Set | Buy From Here[2]
Women Wedding Party Jewelry Sets| Buy From Here[3]
For daily outfit choose something more simple and casual, that keep your look younger like these:
Crystal Happy Smile Face Pendant Necklaces | Buy From Here[4]
Four Leaf Clover Necklace | Buy From Here[5]
ZWC Chemical Molecular Pendant Necklace | Buy From Here[6]
Just all you need to avoid the dark necklaces and let the dress style talk. Have a great shopping.
Footnotes
[1] Vintage Imitation Pearl Crystal Jewelry Sets
[2] YIKALAISI Natural Freshwater Pearl Jewelry Set
[3] Women Wedding Party Jewelry Sets
[4] Crystal Happy Smile Face Pendant Necklaces