Dragon's Breath Opal Glass 925 Sterling Silver Ring

I set a vintage dragon's breath opal glass stone inside an oxidized 925 sterling silver ring with a crown setting. The ring is adjustable approximately from size 5.5 to 7.5. The flashes inside the opal make it look like dragon's breath. The opal is 8mm in diameter. The ring is marked 925 and JBB. The sterling setting was hand made in Israel. Dragon's breath opal is a glass stone that was first made in Bohemia in the early 1900's. It was made to resemble a Mexican fire opal and was often called by that name. Dragon's breath opals were made by adding metals to the molten glass to create the opal flash effect. The overall color of the glass is reddish orange to coral rose, with flashes of blue and purple inside the glass, depending on the angle it is viewed from. This blue and purple breath of fire is what gives the stone its name. Czech glass, also known as Bohemian glass, has been made since Roman times. It is one of the most popular types of glass produced. These were made in Czechoslovakia from the 1930s on. Each one was handmade by glass artists in the Bohemian style. Stones listed as natural, raw, or rough may have some imperfections and inclusions. Be sure to check all photos, including the zoom feature, for details about a particular stone. Please see photo with ruler for size. Colors may vary with individual monitors. Many stones are susceptible to fading, and they should be kept out of direct sunlight. Do not use hot water or salt water to clean them. Stone properties and descriptions are for informational purposes only and do not offer any guaranteed outcomes. Also, they are not intended as a substitute for medical care.