Antique ring centering a 3.04 carat old European cut diamond, with GIA report stating that it is J color, VVS2 clarity. Flanked by a pair of smaller old European cut diamonds of approximately .30. carats each, mounted in 14k yellow gold. Center: 10.1x19.5mm, shank: 1.3-2.2mm. Circa 1890. 

Oddly, nothing makes a large diamond look more wearable than inviting a couple of its smaller friends and making it a three-stone ring. It's true. View video of this ring

Diamond and gold mining has caused devastation in areas such as Africa, wreaking havoc on delicate ecosystems and communities. Choosing to go vintage, you are eliminating the need for more mining and lessening the demand for new diamonds.