莆田天然青石蛋出自闽东南湄洲湾笏石半岛五候山脉的低丘红壤台地,这里地处新华夏系第二隆起带,地层多由火成岩构成,其中花岗岩、流纹岩分布较为普遍。从侏罗纪到的垩纪先后多期多次的火山喷溢,到后期的岩浆侵入原先的火山岩内,又形成了各种侵入岩,在低丘壤台地地表下,沉积成各种大小不一的扁圆形灰绿岩石蛋。露出或半裸于台面的石蛋,因千百年日晒雨淋,自然造化成黑、灰、黄、褐等各色斑斓“蛋壳”,有的甚至还遗存着海蚀的痕迹,但其内里却是号称“绿豆 Putian natural bluestone egg is from the low-lying red-bed platform of the lower Wuhou Mountain in the southeastern Fujian Shentang Peninsula, which is located in the second uplift of the Neo-Huaxia System. The strata are mostly composed of igneous rocks, of which granite and rhyolite are more commonly distributed. From the Jurassic to the Cretaceous, there have been many volcanic spurting over many times to the late magma intrusion into the original volcanic rocks, and formed a variety of intrusive rocks, in the low-lying platform under the surface of the earth, deposited into various sizes not A flat round gray-green rock egg. Stone eggs exposed or semi-naked on the countertop, because thousands of years of sun and rain, naturally made of black, gray, yellow, brown and other colorful gorgeous “eggshell”, and some even left traces of sea erosion, but its inside Is known as "mung bean