GIA Poster Gemstone Regions Map 20x32inch. Great educational and informative poster that lists all the major gem regions in the world and the gemstones found there. Title: Major World Gem Producing Regions. Very rare! In great shape on high quality glossy paper, but does have small pin holes in the corners. Item is as originally prefolded to 10x8 and will be shipped that way in 9x12 large flat envelope.