What is the shape of a sugar crystal?
Sugar, like any crystallizing material, can configure into a multitude of shapes. Often this depends on the kind of sugar. Sugar comes in various ordered formations. I recall an older episode of the Magic School Bus animated series that described white sugar crystals as being similar to a gemstone cut at a jewellers. There are many websites available describing crystallographic forms, but an organic chemist might be able to better describe typical formations for sucrose (table sugar) or any other sugars you may have in mind.