This particular chain (one of my favorites) is made to fit at the bottom of one's neck and is about 1/4" wide. I've made the aquamarine pendant removable, so the chain can be worn alone if one prefers. The chain pattern is from Jean Stark's book, "Classical Loop-in-Loop Chains," which is a MUST for anyone doing metalsmithing.
Then I picked a big, bold, blue Australian Opal for my next design. I just can't tell you how much I love Australian Opals.