Jay King Purple Gemstone Necklace 925 Mine Finds possible iolite

Jay King Purple Gemstone Necklace 925 Mine Finds The stones kind of look like the purple opal by Jay King but I'm really not to sure. Please take a look at the photos - if you know please message me. Thanks Another Seller said it could be iolite) Nice looking vintage necklace - stones in good shape. This item is pre-owned and probably has been worn, stones in good shape. 520