Originally Posted by
lightspree
Pendants made from it are considered low-end costume jewelry, largely because the material is so easy to scratch.
I've learned a bit about engagement rings recently. Diamonds and sapphires are popular because, well, you wear them on your hand. And people use their hands to do stuff. You lean your bike against things, sometimes hang stuff off the bike, etc, but on the whole, your body probably takes more abuse day in and day out than your bike does.