You might assume that a three-carat gemstone always commands a higher premium than a one-carat stone of the same variety. In the world of rare chrysoberyl, this logic often fails. Collectors frequently find themselves asking, what is the difference between a sri lankan origin and a brazilian origi …

A top-quality 1 carat Colombian emerald often commands a price 300 percent higher than an equivalent stone from any other corner of the globe. This staggering premium exists because these stones possess a unique geological "glow" caused by a rare absence of iron in the sedimentary beds of the Andes …