| May |
| Kalamazoo Rock, Gem, Fossil, Jewelry and Mineral Show | Kalamazoo Expo Center, Kalamazoo, Michigan, United States | Fri 3rd - Sun 5th May 2013 |
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| 50th Annual Symposium Canadian Micro Mineral Association | Brock University , ON L2S 3A1 Canada, Saint Catharines, Ontario, Canada | Fri 3rd - Sun 5th May 2013 |
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| 50th Annual Gem & Mineral Show | Topsfield Fairgrounds, Topsfield, Massachusetts, United States | Sat 4th - Sun 5th May 2013 |
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| Bozeman Gem & Mineral Show | Gallatin County Fairgrounds , Bozeman, Montana, United States | Fri 10th - Sat 11th May 2013 |
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| Newmarket Rock Gem 'n' Bead | Newmarket Racecourses, Newmarket, United Kingdom | Sat 11th - Sun 12th May 2013 |
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| Oxford Mineral Fossil Show | Exeter Hall, Kidlington, Oxfordshire, United Kingdom | Sun 12th May 2013 |
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| The 1st China (Changsha) Mineral & Gem Show | Hunan International Convention & Exhibition Centre, Changsha, Hunan, China | Thu 16th - Mon 20th May 2013 |
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| West Coast Gem & Mineral Show | Holiday Inn - Orange County Airport, Santa Ana, California, United States | Fri 17th - Sun 19th May 2013 |
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| 45th Annual "World of Gems and Minerals" | Leesport Farmers Market, Leesport, Pennsylvania, United States | Sat 18th - Sun 19th May 2013 |
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| 6th Annual Seattle Mineral Market | Lake City Community Center, Seattle, Washington, United States | Sun 26th May 2013 |
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