Blue Topaz Ring 14kt Yellow Gold. For sale is a pretty ladies 14kt yellow gold ring with an oval faceted blue topaz. The topaz is very slightly grayish, greenish-Blue in color. The ring is hallmarked 14K, weights 2.24cts and is a size 5. Included with the sale is an independent insurance appraisal of $400.00. The ring was cast and handset and is in very good condition.