For Immediate Release Contact: Field Museum PR Department (312) 665-7100, media@fieldmuseum.org GRAINGER HALL OF GEMS (Permanent exhibition reopens on October 23, 2009) Exhibition At A Glance (Fact Sheet) Grainger Hall of Gems (Main Press Release) Gem Facts A to Z Grainger Hall of Gems Sponsor Statement Download Images To download a 300 dpi jpg image directly to your computer, click on the thumbnail images below. Caption information for all images can be downloaded in PDF format below. Grainger Hall of Gems photo captions Dual View Alexandrite Alexandrite is a rare color-changing stone and The Field Museum’s 11.65-carat alexandrite changes from green in daylight to a dark pink in artificial light.  This image shows the same stone in two different types of light. Photo © The Field Museum Natural Heliodor Heliodor, emerald, aquamarine, and morganite all belong to the same species – beryl. In the new Grainger Hall of Gems, visitors will be able to see examples of each gemstone on its matrix. Photo © 2008 The Field Museum Ruby and Diamond Necklace This glittering necklace showcases 13 rubies, totaling 90 carats and hundreds of sparkling round and accent diamonds, set in platinum. Photo © 2008 The Field Museum Natural Form Coral Necklace Though not an “official” gemstone, coral is considered an organic gem and has been used in jewelry for thousands of years.  This gorgeous necklace is actually the remains of living coral. Photo © 2008 The Field Museum For additional images, contact the press office at (312) 665-7100 or media@fieldmuseum.org.