| Description: The material_type element indicates the general type of the specimen. |
| 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: 30 |
| 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 |
| | Amorphous | Sample without crystalline structure or long range order, e.g., glass |
| | Brine | Sample that contains solute in a liquid solvent. |
| | Consolidated Mixture | Sample that is cemented or otherwise aggregated into a solid mass |
| | Element | Sample composed of a single element such as metallic iron |
| | Ice | Solid sample composed of gas or liquid (e.g., water vapor or water) now in solid form |
| | Mineral | Sample with a given composition within a defined range of compositions and that exhibits a defined crystalline structure |
| | Organic | Sample composed of organic materials |
| | Rock | Solid sample composed of one or more minerals |
| | Single Particle | Sample composed of a single particle |
| | Unconsolidated Mixture | Sample of loose or disaggregated material that is a mixture of various minerals and/or other compounds |