| Locality type: | District |
| Classification |
|---|
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| Species: | 'Chromium-dravite' (not an IMA approved species) |
| Formula: | NaMg3Cr63+(Si6O18)(BO3)3(OH)3(OH) |
| Comments: | Extremely unlikely occurrence of a chromium-bearing tourmaline in a granite pegmatite. The statements in Min Rec. 33:215 are insufficient to accept this identification. Optics, specific gravity, and "gemological techniques" can not be accepted as conclusive proof. Quantitative chemical analyses are necessary. |
| Confirmation |
|---|
|
| Validity: | Erroneously Reported |
| Data |
|---|
|
| Mineral Data: | Click here to view Chromium-dravite data |
| Locality Data: | Click here to view Barra do Salinas District, Coronel Murta, Minas Gerais, Brazil |
| Data Identifiers |
|---|
|
| Mindat Occurrence Record ID: | 47614 |
| Long-form Identifier: | 1:3:47614:2 |
| GUID (UUID V4): | 1845152b-ccd9-4f02-8336-8fc422af07b6 |
| References |
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