My name is June Zhu from TIANJUN (WUHAN) LASER CO.,LTD. We are one of the biggest manufacturer in laser subsurface engraving machine. Our machine can engrave 2d/3d images inside the crystal. If you are interested in our machine, pls contact me. I can offer you more details. thanks and b.rgds, Ms. June Zhu lasermachinery@yahoo.com.cn tel:86 27 67168402