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Intangible assets (Tables) | 12 Months Ended
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Dec. 31, 2025
Notes and other explanatory information [abstract] |
Schedule of reconciliation of changes in intangible assets |
Schedule of reconciliation of changes in intangible assets |  |  |  |
|  |  |  | 2025
| Goodwill (i) | Rights to use natural resources | Others | Total
Balance at the beginning of the year | 305,397 | 507,491 | 21,799 | 834,687
Cost | 316,087 | 1,810,609 | 49,896 | 2,176,592
Accumulated amortization and impairment | (10,690) | (1,303,118) | (28,097) | (1,341,905)
Balance at the beginning of the year | 305,397 | 507,491 | 21,799 | 834,687
Additions | - | - | 1,994 | 1,994
Disposals and write-offs | - | - | (1) | (1)
Amortization | - | (48,122) | (3,627) | (51,749)
Impairment reversal of long-lived assets | - | 83,817 | 26 | 83,843
Foreign exchange effects | 811 | 6,844 | 2,523 | 10,178
Effect of new subsidiary acquisition | - | - | 7 | 7
Transfers | - | (1,184) | 153 | (1,031)
Balance at the end of year | 306,208 | 548,846 | 22,874 | 877,928
Cost | 318,239 | 1,844,122 | 51,630 | 2,213,991
Accumulated amortization and impairment | (12,031) | (1,295,276) | (28,756) | (1,336,063)
Balance at the end of year | 306,208 | 548,846 | 22,874 | 877,928
Average annual depreciation rates % | - | UoP | 5 |
|  |  |  | 2024
| Goodwill (i) | Rights to use natural resources | Others | Total
Balance at the beginning of the year | 307,112 | 579,551 | 22,616 | 909,279
Cost | 630,787 | 1,859,147 | 53,865 | 2,543,799
Accumulated amortization and impairment | (323,675) | (1,279,596) | (31,249) | (1,634,520)
Balance at the beginning of the year | 307,112 | 579,551 | 22,616 | 909,279
Additions | - | - | 5,748 | 5,748
Disposals and write-offs | - | (226) | (116) | (342)
Amortization | - | (65,710) | (2,435) | (68,145)
Impairment reversal of long-lived assets | - | 9,534 | - | 9,534
Foreign exchange effects | (1,715) | (15,433) | (5,152) | (22,300)
Transfers | - | (225) | 1,138 | 913
Balance at the end of year | 305,397 | 507,491 | 21,799 | 834,687
Cost | 316,087 | 1,810,609 | 49,896 | 2,176,592
Accumulated amortization and impairment | (10,690) | (1,303,118) | (28,097) | (1,341,905)
Balance at the end of year | 305,397 | 507,491 | 21,799 | 834,687
Average annual depreciation rates % | - | UoP | 5 |
(i) As of December 31, 2025, the Company’s recognized goodwill balances were as follows: USD 95,411 (2024 - USD 95,087) allocated to Cajamarquilla CGU, USD 4,374 (2023 - USD 3,887) allocated to Juiz de Fora, and USD 206,423 (2024 - USD 206,423) allocated to the Mining Peru group of CGUs.

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118&doctype=Standard -URIDate 2024-03-27 + Details
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