| April |
| Houston Fine Mineral Show 2011 | Embassy Suites Hotel - near the Galleria, Houston, Texas, United States | Fri 29th Apr - Sun 1st May 2011 |
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| 48th Annual Gem & Mineral Show | Topsfield Fairgrounds, Topsfield, Massachusetts, United States | Sat 30th Apr - Sun 1st May 2011 |
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| May |
| Manchester Rock Gem Bead Show | Event City Manchester, Manchester, United Kingdom | Sat 7th - Sun 8th May 2011 |
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| 22nd Maine Mineral Symposium | The Senator Inn & Spa, Augusta, Maine, United States | Fri 13th - Sun 15th May 2011 |
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| Wheeling area rock, mineral, gem, jewelry and fossil show | Second Presbyterian Church, Wheeling, West Virginia, United States | Sat 14th - Sun 15th May 2011 |
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| Somerset RocknGem May Show | Bath and West Showground, Shepton Mallet, United Kingdom | Sat 14th - Sun 15th May 2011 |
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| West Coast Gem & Mineral Show | Holiday Inn - Orange County Airport, Santa Ana, California, United States | Fri 20th - Sun 22nd May 2011 |
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| 62nd International Freiberg Mineral Show | Heubner-Sporthalle, Freiberg, Germany | Sat 21st May 2011 |
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| 4th Annual Seattle Mineral Market | Lake City Community Center, Seattle, Washington, United States | Sat 21st May 2011 |
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| Mineralienwelt Idar-Oberstein | Messe Idar-Oberstein GmbH, Idar-Oberstein, Rheinland-Pfalz, Germany | Fri 27th - Sun 29th May 2011 |
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| Fort Worth, Texas Gem & Mineral Club Show | Will Rogers Memorial Center, Fort Worth, Texas, United States | Sat 28th - Sun 29th May 2011 |
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