You really can find jewelry everywhere… a few days ago, I was watching a British antiques show and someone had a collection of pieces made with Blue John, a quartz found only in the Treak Cliff Cavern in the United Kingdom. It’s a really pretty stone, and can be bluish purple or yellow.
The Treak Cliff Cavern online store offers a lot of different items, including jewelry made with sterling silver or gold. Here, a 9 carat gold ring set with a marquise piece of Blue John. This sells for £650.