"ODI" (Original Designs) is a trademark by Tache USA Inc. It is the manufacturer’s hallmark on the jewellery.
14k gold is commonly found in cases where strength is important, like in earring backs and bracelet clasps. Technically 14K should be 583 (14/24 = .583333) but most manufacturers have adopted the European way and make 14k gold a tiny bit over 14k, so the mark is 585 in most 14k jewellery.
Gold is among the most loved precious metals in the world. It's a wonderful ornament to wear as well as a great hedge against inflation and falling markets. Check out some tips on buying gold jewellery at NDTV.com.