A portrait inside a photo crystal is made with modern laser technology. Engraving natural crystal has a much older history, reaching back to ancient craftspeople who cut images into its surface. The materials and methods have changed considerably along the way.
Carving natural quartz
Historical rock crystal is a clear, colorless form of quartz. Craftspeople carved designs into it, including intaglios: images recessed below the surface.
The Metropolitan Museum of Art describes a rock crystal intaglio signed by Eutyches, an artist who lived in the first century BC. This is one documented example of crystal engraving from more than two thousand years ago.
Working crystal required skill. Its hardness made carving difficult, and the necessary expertise was uncommon in the ancient world. National Museums Scotland records that workshops in Imperial Rome had the technology to produce carved rock crystal objects.
Crystal in courts and collections
The craft later flourished in Fatimid Egypt. Raw crystal was imported to Cairo from the East African coast, and rulers included finished crystal objects in their treasuries. Some pieces eventually reached European courts and churches.
Ancient engravings also interested Renaissance collectors. In 1445, the Italian antiquarian Cyriacus of Ancona wrote about the crystal signed by Eutyches, describing details he could see when holding it toward the light. The piece was still being studied and admired centuries after its creation.
Creating an image beneath the surface
Internal laser engraving brought a different way of working. A laser focuses at selected points inside a transparent material, creating tiny marks that form an image. The outer surface can remain intact.
A US patent filed in 1993 and granted in 1997 documents a method for making these internal images with a pulsed laser. It is one record of the technology’s development, rather than a definitive starting date for every form of laser engraving.
The word “crystal” also covers different materials in these contexts. Ancient rock crystal is natural quartz; modern subsurface engraving can be carried out in manufactured glass. A photo crystal therefore has a different material and technical history from an ancient carved gem.
At 3D Heirloom, our personalized photo crystals use internal laser engraving to create a portrait from a photograph you choose, placing the image within the clear material.
