玉矿

该区地层为下元古界桃湾群（Pt1t），玉矿赋存于浅海相泥质碳酸盐岩及钙质泥岩，局部夹中基性火山岩的桃湾组中。

The quality of the two jades was also appraised in the paper . The stratum of the area is proterozoic , Tao wan group ( Pt1t ) .

吴地早期玉器与梅岭玉矿的关系

The relation between the early jade in Wu area and Meiling jade

辽宁岫岩软玉砂矿（又称河磨玉矿）是原生软玉矿的次生砂矿床。

Liaoning Xiuyan Nephrite Placer Deposit ( XNPD ) is a secondary deposit of primary nephrite ore.

春川市是著名的玉矿产地，为汉城提供主要的水源。

Chuncheon is famous for it 's Jade mine and is the main water source for Seoul .

在昆仑山北麓，凡上游有玉矿，中下游就可找到子玉。

At northern foot on the mountain of the kunlun , all there are jade ores in the upper reaches , the midstream and downstream can find the sub jade .

矿物颗粒极细，质地细腻，硬度为7.比重3.2～3.4。研究后认为回龙玉矿是在高温低压的环境下，迅速冷凝后形成的特殊矽卡岩型矿床。

Its grains are very fine with hardness of 7 , specific weight of 3.4.It is concluded that the jade deposit is a special skarn type deposit formed in a quick cooling evironment of high temperature and low pressure .