| Description: The material_origin element identifies whether the specimen is natural, synthetic, or natural/doped. |
| Namespace Id: speclib | Steward: geo | Class Name: Specimen_Classification | Type: UTF8_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | Natural | The Natural value indicates that the specimen was not made in a laboratory. |
| | Natural-Doped | The Natural-Doped value indicates natural rock matrices that have been doped with metal oxides. |
| | Synthetic | The Synthetic value indicates that the specimen or some portion of a specimen was manufactured, laboratory-generated, or naturally occuring sample that has been significantly modified (e.g. heating irradiation). Grinding and stirring alone do not count as significantly modified. |