Victorian 18K Gold Black Onyx 1/3ct Old Mine Cut Diamond Ring. Marked and tested as 18K gold. Diamond by formula, couldn't get depth so it may be slightly larger than 1/3ct. H in color SI1 in clarity.Box pictured is NOT included and is for display only. The item "Victorian 18K Gold Black Onyx 1/3ct Old Mine Cut Diamond Ring" is in sale since Thursday, April 15, 2021. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Rings". The seller is "coolcalmandcollectable" and is located in Lebanon, Pennsylvania. This item can be shipped to United States.