Art Deco Old Mine Cushion Diamond and Platinum Octagonal Diamond Engagement Ring, French 1895 47 carat old mine cushion

47 carat old mine cushion cut diamond and black enamel that reads "In Memory Of" and inscribed James Pinkerton Ob

40 carat EGL certified old mine cushion cut diamond with H-I color and SI2 clarity

Art Deco engagement ring centering upon a rectangular-cut emerald weighing approximately 1

Vintage Art Deco ring set with a 1

Art Deco Old Mine Cushion Diamond and Platinum Octagonal Diamond Engagement Ring, French 1895 47 carat old mine cushionAntique ring with a geometric octagonal plaque and centering an old mine cushion diamond of circa . 55 carats with smaller diamonds of circa . 72 carats, in an openwork format. French exportation marks for platinum. Circa 1920. The presence of the geometric plaque almost seems to protect this beautiful chunky stone. Diamond and gold mining has caused devastation in areas such as Africa, wreaking havoc on delicate ecosystems and communities. Choosing