Nice Emerald Cut Colombian Emerald and a signed Ostby & Barton ring. Solid 10k White Gold and open filigree...Ostby lost his life on the Titanic and since these rare jewelry pieces are collected and coveted. Gram Weight: 1.8 Grams. Powered by SixBit's eCommerce Solution. The item "Antique 1920s OSTBY & BARTON 2ct Colombian Emerald 10k White Gold Filigree Ring" is in sale since Sunday, February 24, 2019. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone". The seller is "oldtreasures333" and is located in American Fork, Utah. This item can be shipped worldwide.