"TOUCH OF BLUE" -Photograph of crystalline tartaric acid found in wine

"Touch of Blue" has an intricate floral pattern with subtle coloration. It is a photograph of tartaric acid crystals taken through the microscope. Tartaric acid occurs naturally in grapes and plays a critical role in the taste, feel and color of a wine. It often crystallizes on the cork, yielding “wine diamonds.” The crystals were grown by evaporation on a glass microscope slide then photographed through the microscope. The crystalline facets create the colors by refraction of the transmitted light.