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山东省的金刚石资源十分丰富。传说在明朝时期就有发现。到目前为止,中国已发现的70克拉以上的金刚石皆产于山东省。近百年来,在沂沭河中下游地区每年皆有金刚石问世,其中以郯城余家泉东西岭、神泉院一带发现最多,柳红埠西、莫疃北、陈家埠、郭家团、黄家岭、柳沟等地也经常发现颗粒直径约2—5毫米的金刚石。大于10毫米者也有所发现:1936年郯城一农民在金鸡岭一带捡得一块“金鸡钻石”重281.25克拉;1939年罗莫疃农民罗振邦在郯城余家泉、莫疃之间拾获一颗钻石重218.75克拉(这两颗特大的金刚石均被日寇掠走);1977年12月21日山东省临沭县农民魏振芳(现任临沭县人工晶体厂厂长)发现的特大“常林钻石”,重158.786克拉;1981年8月郯城金刚石矿采得“陈埠2号”钻石,重124.27克拉;近几年来山东省七○一矿
Shandong Province is rich in diamond resources. Legend has it that during the Ming Dynasty. So far, diamonds over 70 karats found in China are all produced in Shandong Province. Nearly a hundred years, in the middle and lower reaches of the Yishu River are diamonds come out every year, of which Yuncheng Yu Jiaquan Dong Xiling, Shenquan Hospital found the most, Liu Hong Bu West, Mo Tuobei, Chenjiabu, Guo Family, Huangjialing, Liu ditch and other places Diamonds with particle diameters of about 2-5 mm are also often found. More than 10 millimeters were also found: In 1936, a farmer in Tancheng picked up a piece of “Golden Rooster Diamond” weighing 281.25 carats in Jinjiling. In 1939, Luo Zhenbang, a farmer from Rumo, picked up a diamond weight between Yu Jiaquan and Mo Xun in Yuncheng. 218.75 Carat (the two large diamonds were swept away by the Japanese invasion); December 21, 1977 Shandong Province Linshu farmers Wei Zhenfang (incumbent Lin Shuxian artificial crystal factory director) found that large “Chang Lin diamond”, heavy 158.786 karats; August 1981 Tancheng diamond mine was “Chenbu No. 2” diamond, weighing 124.27 karats; in recent years, Shandong Province, 71 coal mines