Iolite is not a real well known gemstone, but they are beautiful. High grade Iolite looks a lot like sapphire but at a fraction of the price. The mineral name is Cordierite. It is also sometimes called "water sapphire" These are very nice, gem grade iolites from Kenya. They are set in sterling silver posts. For more details look at eBay item 300294975279
I have had a lifelong interest in gemstones, rocks, minerals and fossils. I've been collecting rocks and gems since I was a kid. I started making wirewrap jewelry a few years back and selling it at craft shows. In 2002 I started selling gemstones, beads and jewelry online, first through eBay and later with my own site, PalmBeachGems.com