1. Small amounts of transition metal impurities given many gemstones wither vivid colors. Ruby, Alexandrite, and Emerald all contain chromium (III) in octahedral sites. Spectra of each gemstone are given in the image at right. (a) Assign the two large, broad transitions shown in the image. Note that the transition assignment is the same for each gem. ( 2 marks) (b) Use the appropriate Tanabe SuganoDiagram to calculate Dq and B for each of those gemstones. Be sure to show your work so we can understand what you did. (6 marks for procedure +6 marks for correct values of Dq and B) Large downloadable Tanabe-Sugano Diagrams can be found via a link on the course website