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6. Properties, Plants and Equipment | 12 Months Ended
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Dec. 31, 2016
Properties Plants And Equipment |
Properties, Plants and Equipment | The major components of the Company's properties, plants and equipment at December 31, 2016 and 2015 are shown below:
|  | Antimony Segment |  |  | Zeolite Segment |  |  |  |
2016 |  | USAC |  |  | USAMSA |  |  | BRZ |  |  | TOTAL |
Plant & Equipment |  | $ | 908,578 |  |  | $ | 7,943,686 |  |  | $ | 3,477,260 |  |  | $ | 12,329,524 |
Buildings |  |  | 247,210 |  |  |  | 900,992 |  |  |  | 349,946 |  |  |  | 1,498,148 |
Mineral Rights and Interests |  |  | - |  |  |  | 3,793,502 |  |  |  | 3,664 |  |  |  | 3,797,166 |
Land & Other |  |  | 3,274,572 |  |  |  | 2,529,294 |  |  |  | 15,310 |  |  |  | 5,819,176 |
|  |  | 4,430,360 |  |  |  | 15,167,474 |  |  |  | 3,846,180 |  |  |  | 23,444,014 |
Accumulated Depreciation |  |  | (2,538,257 | ) |  |  | (2,836,164 | ) |  |  | (2,373,627 | ) |  |  | (7,748,048 | )
|  | $ | 1,892,103 |  |  | $ | 12,331,310 |  |  | $ | 1,472,553 |  |  | $ | 15,695,966 |
2015 |  | USAC |  |  | MEXICO |  |  | BRZ |  |  | TOTAL |
Plant & Equipment |  | $ | 872,548 |  |  | $ | 7,497,791 |  |  | $ | 3,347,629 |  |  | $ | 11,717,968 |
Buildings |  |  | 247,210 |  |  |  | 900,992 |  |  |  | 349,946 |  |  |  | 1,498,148 |
Mineral Rights and Interests |  |  | - |  |  |  | 3,743,352 |  |  |  | - |  |  |  | 3,743,352 |
Land & Other |  |  | 3,274,572 |  |  |  | 2,529,294 |  |  |  | 15,310 |  |  |  | 5,819,176 |
|  |  | 4,394,330 |  |  |  | 14,671,429 |  |  |  | 3,712,885 |  |  |  | 22,778,644 |
Accumulated Depreciation |  |  | (2,456,928 | ) |  |  | (2,131,624 | ) |  |  | (2,159,759 | ) |  |  | (6,748,311 | )
|  | $ | 1,937,402 |  |  | $ | 12,539,805 |  |  | $ | 1,553,126 |  |  | $ | 16,030,333 |
At December 31, 2016 and 2015, the Company had $521,376 and $891,576, of assets that were considered to be construction in progress and had not yet been depreciated. The majority of this amount relates to equipment not yet placed in service.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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