Diamond Pendant in 14K Yellow Gold, 1/3 Carat

This diamond was once in my engagement ring and was purchased in 1975 at Zales Jewelers in El Paso, TX. At the time, we were told it was a 1/3 carat blue white diamond. It is now set in a simple 14k gold setting with 6 prongs. I just purchased an inexpensive 18" 1.5mm gold filled round cable chain and it is meant to be a TEMPORARY substitute for a nicer chain or awaiting reset into something else. It is by no means an appropriate or quality chain for this diamond.