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6. Properties, Plants and Equipment (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Plant and equipment | $ 12,329,524 | $ 11,717,968
Buildings | 1,498,148 | 1,498,148
Mineral Rights | 3,797,166 | 3,743,352
Land & Other | 5,819,176 | 5,819,176
Total | 23,444,014 | 22,778,644
Accumulated Depreciation | (7,748,048) | (6,748,311)
Properties, plants and equipment, net | 15,695,966 | 16,030,333
USAC |  |
Plant and equipment | 908,578 | 872,548
Buildings | 247,210 | 247,210
Mineral Rights | 0 | 0
Land & Other | 3,274,572 | 3,274,572
Total | 4,430,360 | 4,394,330
Accumulated Depreciation | (2,538,257) | (2,456,928)
Properties, plants and equipment, net | 1,892,103 | 1,937,402
MEXICO |  |
Plant and equipment | 7,943,686 | 7,497,791
Buildings | 900,992 | 900,992
Mineral Rights | 3,793,502 | 3,743,352
Land & Other | 2,529,294 | 2,529,294
Total | 15,167,474 | 14,671,429
Accumulated Depreciation | (2,836,164) | (2,131,624)
Properties, plants and equipment, net | 12,331,310 | 12,539,805
BRZ |  |
Plant and equipment | 3,477,260 | 3,347,629
Buildings | 349,946 | 349,946
Mineral Rights | 3,664 | 0
Land & Other | 15,310 | 15,310
Total | 3,846,180 | 3,712,885
Accumulated Depreciation | (2,373,627) | (2,159,759)
Properties, plants and equipment, net | $ 1,472,553 | $ 1,553,126

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