- Hiddenite Gem Mines, North Carolina
- Crater of Diamonds State Park, Arkansas
- Morefield Mine, Amelia, Virginia
- Crystal Grove Diamond Mine, St. Johnsonville, New York
- Royal Peacock Mine, Virgin Valley, Nevada
- Himalaya Mine, Mesa Grande District, California
- Gold 'n' Gem Grubbin' Mine, Gold Nugget Lane, Cleveland, Georgia
- Ron Coleman Mining, Jessieville, Arkansas
- Rock Hound State Park, Deming, New Mexico
- Gem Mountain, Spruce Pine, North Carolina
- Bonanza Opal Mine, Denio, Nevada
- Graves Mountain, Lincoln County, Georgia
- Alabama Gold Camp, Lineville, Alabama
- Spencer Opal Mines, Spencer, Idaho
- Spectrum Sunstone Mine, Plush, Oregon
- Woodward Ranch, Alpine, Texas
- Gem Mountain, Philipsburg, Montana
dec 31 2017 ∞
dec 31 2017 +