I am currently the Digital Coach for the City of London and the West, within the London and Midlands Region. My role in a nutshell is to coach our leaders on sustainable banking whilst making the lives our of customers easier.
(There is also genuine color-change sapphire which mimics alexandrite, as well as color-change garnet that can be a real fooler.). The first thing to do is check the refractive index of the stone, since each material has unique optical properties.
Color Change Sapphire Color. Fancy color change sapphire changes hue based on the source of light. The most common color shift is from blue (daylight) to bluish-purple (incandescent light), but various other color combinations are possible. Blue sapphire is colored by iron and titanium. Violet colors are owed to traces of vanadium.