http://www.paris-travel-guide.info/eiffel-tower-ornaments/
How do they make those crystal glass ornaments with a 3D picture inside?
You can buy an ornament made of crystal with a 3D image inside, of say the Eiffel Tower, Big Ben, or the Golden Gate Bridge. Also you can have one made using a specially taken photo of yourself or a loved one.
How do they get the 3D image into the block of glass????
They use lasers to heat and melt the various points inside the block as lasers can be focused on very small areas.
Create Eiffel tower ornament