4. With or without a {gemstone} pendant
If you prefer a necklace with a gemstone pendant, it's important to find a good balance. We don't want overkill.
Style rule: it all comes down to the number of layers. A two layer stacking necklace can be worn with one large pendant or two small pendants. If stacking with 3 to 4 layers, it's better to choose only small pendants.
Be playful and combine different gemstone colors.
If you want to create a polished look, you can choose a single color gemstone or go for a plain and polished look none.
5. Type of chains
The type of chains don't necessarily have to match. One rule could be to start from delicate to bold or the other way around. The first or last chain is the one you should focus your attention on.
Different chains add a little depth and an eclectic flair. Inspiration is everywhere, so feel free to ask or share ideas. Here are some inspirational images to help you on your way.