The origin of a gemstone can greatly affect its value. It is more important in rubies, sapphires and emeralds than in colour diamonds, with the exception of pink Argyle diamonds. The reason price is affected by origin, is that each geographical region gives a stone its own signature look. Burmese Rubies and Sapphires often look quite different to those from Mozambique or Madagascar.
Ruby comes generally from 2 main geographical regions. ASIA: Burma, Thailand, Vietnam, Sri Lanka. AFRICA: Mozambique, Tanzania Madagascar. Burma is most prized.
Sapphire origins follow a similar pattern to rubies, but the most sought after sapphires come from Kashmir, now mostly exhausted, then Burma, Sri Lanka, Madagascar, and other areas such as Thailand, Australia, China, and even Montana.
For Emeralds, the main origins are: Colombia, Brasil, then Zambia and Afghanistan supplies very small stones to the market