Yeah, my friend's necklace is lovely, and versatile.
I think the reef in Bali is quite protected so it should be a perfect diving destination if you ever get the chance to visit. I guess it all boils down to finding a reputable company. My friends had a horrible experience that was quite a scare, luckily they were released ok from the hospital.
Overall, it was an amazing trip, and I just wished I had more time to explore:)))