The Royal Peacock Opal Mine is loed off Hwy 140 in Valley, approximately 35 miles from Denio, Nevada. The Royal Peacock has one small cabin (sleeps 3) and one small trailer (sleeps 2). Click for details. Rough and polished opals, opal jewelry, opal display domes, tool sales and rental, firewood, sunscreen, hats, Tshirts, cool drinks ...