Velvety Cobalt French Paste stone with a deep royal blue color (tested) really stands out against the solid 9k yellow gold setting. The crown style setting is done in solid 9k yellow gold and is solid and sturdy.This ring is tested 9k. Very similar to the Ostby & Barton Filigree Solitaires from the same era. The item "Victorian 9k Yellow Gold. 85ctw Cobalt Blue Paste Rose Cut Diamonds Ring, 1800s" is in sale since Saturday, October 5, 2013. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Retro, Vintage 1930s-1980s\Rings". The seller is "kingcollection1" and is located in Los Angeles, California. This item can be shipped worldwide.