Estate 0.40ct natural earth-mined diamond vintage old round cut almost 1/2 carat

Vintage / antique genuine NATURAL single loose diamond, very sparkly and pretty. This is an earth-mined diamond. Approximately 0.40 carat, approximately 4.5mm diameter, H color, I1 - I2 clarity. Looks to be round brilliant or early round brilliant. It is very nice and pretty and faces up white. Pictures and videos were taken on a rainy day. The diamond is more beautiful in person. Perfect for jewelry making or if you just want to own a vintage diamond. Some pictures are enlarged to show details. Last picture is a scrap price estimate on stone algo as of sept 24 2025. Estimated retail $1300 in jewelry stores This diamond has been checked by a GIA gemologist and will be verified again by poshmark’s authentication team for free with a purchase of $500+ vintage diamond, antique diamond, old cut diamond, oec, omc, sustainable, old european, old euro, heirloom, timeless, estate jewelry, fine jewelry, custom jewelry, art deco, edwardian, Victorian, retro, engagement ring, luxury, lux, catbird, collectible, ooak, recycled diamond, real diamond