请网友和观众在线鉴宝！这个到底是不是矿上的东西？是老矿的东西吗？月光石？我花了 1600多 RMB 买的！Please help me appraise this treasure online! 

Please help me appraise this treasure online! Is this from a mine? Is it from an old mine? Is it called a moonstone? I don't know, please help me! Is it valuable? I bought it for more than 1,600 RMB!