Despite the beauty of Campari (seen here) and other alcoholic beverage crystals, Cesare's favorite subject is rocks. Some are particularly challenging. Sedimentary rocks like calcite and dolomite, for example, create dull images. However, he and his colleagues have developed ways to get color from these stones in a project called DolomitiArtRock.
Split the difference
Campari crystals appear red on the left and purple on the right due to differences in orientation and thickness. Polarized light creates brilliant colors without post-processing of the images.
Sea grass, or drink in a glass?
Feathery crystals of Campari pop in red and green in this image by geoscientist Bernardo Cesare. The Italian beverage proved sugary enough to create complex crystals that Cesare could photograph using polarized light.
That's no ice crystal – it's Italian geologist Bernardo Cesare's mother-in-law's homemade limoncello. The drink, a favorite in southern Italy, is made from lemon zest soaked in spirits and then mixed with simple syrup. Simple syrup, of course, is quite sugary, meaning that when drops of limoncello dry, they form beautiful sucrose crystals.
Limoncello up close
Homemade limoncello looks like a map of a Norweigan fjord under the microscope. Crystals from the sugary drink are revealed by polarized light.