Opal in Ironstone Business Card Holder- Australia. All of our crystals are natural and hand selected by our store owner, a 30 year GIA Graduate Gemologist. Crystalarium - True Gifts of the Earth.This beautiful polished cardholder features thick veins of iridescent rainbow Opal fire making graceful swirling patterns against an earthy brown Ironstone matrix. The item "Opal in Ironstone Business Card Holder- Australia" is in sale since Wednesday, October 26, 2016. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Decorator Pieces". The seller is "crystalariumcom" and is located in West Hollywood, California. This item can be shipped worldwide.