A dreamy, romantic black opalengagement ring set featuring a Oval Oct Birthstonehandcrafted in your choice of material which you can choose.. center stone was surrounded by diamonds each side,This vintage opal diamond ring makes a lovely engagement/anniversary/promise ring for her. Product Information Engagement Ring: Metal Sterling Silver, 10k/14k/18k gold, Platinum Center Stone Black Opal Shape Oval Weight Approx 1.5 carat Size 6x8 mm Accent stones Diamond Set Prong, Pave Set The Meaning Of Black Opal: Black opal gemstone is said to strengthen your character.Since black color remains black,the meaning of Black Opal is to be yourself. Opal has wide variety of colors.