These solid gold buckles are available in 14K or 18K yellow, pink or white gold. Available in standard sizes:14,15,16 and 18 mm (measurement of your band at the buckle end). The buckle in 14K gold weighs about 3.5 grams and in 18K gold about 4 grams.
Price is OVER $300 for 18K gold buckle and OVER $700 for platinum. The big price difference between the 18K gold and platinum is due to the fact that this buckle weighs close to 8 grams in platinum and the finishing labor is higher as well. 14K gold buckle is somewhat cheaper than 18K gold one.