keywords: laser subsurface engraving machine, subsurface engrave machine, inner engraving, marking maching, color crystal engraving, 3 dimension laser, three dimension laser, crystal, laser engraving, engraving machine, cutting machine, magnetic material, laser subsurface engraving machine, subsurface engrave machine,inner engraving, marking maching, color crystal engraving, 3d laser, 3 dimension laser, three dimension laser, crystal, blank crystals, color engraving crystals, crystal chain, crystal key chain,crystal award, crystal trophy,crystal ashtray,crystal balls,crystal clock laser subsurface engraving machine obtains the following characteristics: firstly, take 3D photo of a person with 3D camera and process it in computer to form 3D portrait; secondly, utilizing laser focusing technology, it can engrave 3D everlasting portrait inside crystals. With the development of material life, people are paying more and more attention to the pursuance of spirituality and individuality. Therefore, with a broad market, the 3D subsurface engraved portraits are becoming more and more popular.