Click to add notes Density Lab Part 4. Solve the Mystery. The unknown is actually a gemstone. A robbery occurred at a nearby jewelers and a large diamond was stolen. A suspect was apprehended and a large gemstone of similar properties was recovered. The suspect has stated that the gemstone recovered is actually a Cubic Zirconia, a cheap facsimile that looks strikingly similar to diamond. Your job as an analytical chemist is to research the densities of cubic zirconia and diamond. Use the density of the unknown to present an argument to the arresting officers for or against holding the suspect. Write your argument in complete sentences on the next slide! Click to add notes