This is a necklace that I made several years ago (not sure if I wrote a post about it). I really like the look of it but the length of the necklace made it difficult to wear with many outfits.
The solution was to make extensions with chains, jump rings and hooks.
I think the resulting necklace has more balance and is more wearable because of its length. Also I can still easily convert the necklace into the original one by simply unhooking the extensions. I hope this quick fix for lengthening a necklace is something you'll try to double the life of your favorite jewelry. Happy Crafting!