Keeper Ring - Antique Jewelry University --- In jewelry a keeper ring is a close fitting ring of simple design which is worn on the finger to prevent another - more valuable - ring from sliding off that finger. When the diamond ring became the popular love token in the mid-18th century, keeper rings were worn to protect the larger more costly diamond ring. As the diamond ring morphed into a betrothal ring (c.19th century) the keeper became more elaborate and evolved into the wedding band.
Rose Gold Plated Sterling Silver Chevron Style Ring Guard with Millgrained Edges and Filigree Cut Out Design set with Cubic Zirconia (0.74 Ct. Twt.) TwoBirch http://www.amazon.com/dp/B00CKHIM0Q/ref=cm_sw_r_pi_dp_wVDfvb1HNAC1W