... effect! Warm promptly:if you use our engraving for the first time ,please contact us for get suggestions which are ... too. Warm promptly:if you use our engraving for the first time ,please contact us for get suggestions which are good ... hard materials, such as stone, granite, gravestone , ceramic tiles, glass, marble, etc. 2. Applicable engraving : Multifunctional, like 3D relief sculpturing ,cutting ...