| Cover | Nov. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 3, 2021 |
| Entity File Number | 000-55191 |
| Entity Registrant Name | BRAZIL MINERALS, INC. |
| Entity Central Index Key | 0001540684 |
| Entity Tax Identification Number | 39-2078861 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | Rua Vereador João Alves Praes nº 95-A |
| Entity Address, Address Line Two | nº 95-A |
| Entity Address, City or Town | Olhos D’Água, MG |
| Entity Address, Country | BR |
| Entity Address, Postal Zip Code | 39398-000 |
| City Area Code | (833) |
| Local Phone Number | 661-7900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not applicable |
