Like Harry Potter? Abstergo is working on creating one of the most iconic objects in the Harry Potter series, the cloak of invisibility. This cloak would be useful in military operations, like hostage rescues and defense. We are experimenting with crating a cloak out of calcite positioned in such a way as to refract light surrounding a solid object when placed between the crystals. We are working with nature by using the calcite’s natural birefringence to create the refraction. Using calcite does not require any nanofabrication which is a time consuming process. Nanofabrication also limits how big of an object is able to be cloaked. Other methods are also being looked into and more information will be available in the future.