月岩，即月球上的岩石。其来源有三：

阿波罗计划中的月球标本由多种不同的工具采集，包括锤、耙、铲、钳以及钻探采集。大多数被采集前的标本都有照片记录标本的原貌。标本采集后被放入有编号的标本袋中。带回地球后，标本被保存在特别环境标本容器（Special Environmental Sample Container）中，以确保月球标本不被地球环境污染。

通过放射测年后，研究人员发现月表岩石标本与地球相比都很古老。月海中的玄武岩标本的年龄多在32亿年左右，高地中的标本甚至达到46亿年的年龄。由此可见，月球是在太阳系早期形成的。

Moon rock or lunar rock is rock that is found on the Earth's moon, or lunar material collected during the course of human exploration of the Moon.

Moon rocks on Earth come from three sources: those collected by the US Apollo manned lunar landings from 1969 to 1972; samples returned by three Soviet Luna unmanned probes in the 1970s; and rocks that were ejected naturally from the lunar surface by cratering events and subsequently fell to Earth as lunar meteorites. During the six Apollo landing missions, 2,415 samples weighing 380.96 kilograms (839.87 lb) were collected. Three Luna spacecraft returned with 326 grams (11.5 oz) of samples. Since 1980, over 120 lunar meteorites representing about 60 different meteorite fall events (none witnessed) have been collected on Earth, with a total mass of over 48 kilograms (106 lb). About one third of these were discovered by US and Japanese teams searching for Antarctic meteorites (e.g., ANSMET), with most of the remainder having been discovered by collectors in the desert regions of northern Africa and Oman.