Category:3D laser engraving

**bubblegram**
	3D image composed of points suspended in a medium, typically a plastic block
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Subclass of	engraving;
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	Q1529623;
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English: A 3D crystal engraving (a.k.a. bubblegram, laser crystal or vitrography) is a physically real three-dimensional image composed of many small points of fracture or other visible deformation within a solid block of glass or transparent plastic. Each point is created by a laser beam focused to high intensity at that location by a computer-controlled opto-mechanical system.