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钻石是人类所发现的宝石中最坚硬的一种,但它的成份却极为简单,它不过是普通的炭化物。钻石的熔点高达华氏6900°,比钢的熔点高出两倍半。在几千万年前,碳在地心承受了无比的热力和压力,晶化为钻石。火山爆发期间,熔岩把含有钻石的岩石带上地面。其后火山运动消退,熔岩凝固,形成金巴利管状脉。大部份的钻石都是在这种金巴利管状脉发现的。
Diamonds are the hardest kind of gemstones human beings find, but its composition is extremely simple, it is nothing more than ordinary carbonized material. The melting point of diamonds up to 6900 ° F, two and a half times higher than the melting point of steel. Tens of millions of years ago, carbon in the Earth’s core to withstand the unparalleled heat and pressure, crystallized into diamonds. During volcanic eruptions, lava carries the diamond-bearing rocks to the surface. Volcanism subsided afterwards, lava solidified, the formation of Jinbali tubular vein. Most of the diamonds were found in this Jimbal tube.