山铜（古希腊语：Ὀρείχαλκος， 英语：Orichalcum，又译奥利哈钢、俄瑞卡尔科斯、奥里哈鲁根、奥利哈康或王者金属) 是一些古文献中提到的一种金属，如柏拉图的《克里提阿篇》中描述亚特兰提斯的故事。依据《克里提阿篇》中的描述，山铜的价值被认为仅次于黄金，并在远古亚特兰提斯的许多地区被发现和开采。而后，在《克里提阿篇》成文的年代，仅仅知道名称。在货币学中，它是一种金黄色的铜合金（即黄铜）用来制造古罗马硬币塞斯特蒂和都庞地亚。在现代许多潮流文化，如奇幻小说和视频游戏，山铜成为一种宝贵矿藏可被开采和制成强大的铠甲和武器。

Orichalcum or aurichalcum is a metal mentioned in several ancient writings, including the story of Atlantis in the Critias of Plato. Within the dialogue, Critias (460 – 403 BC) claims that orichalcum had been considered second only to gold in value and had been found and mined in many parts of Atlantis in ancient times, but that by Critias' own time orichalcum was known only by name.