Random triples
| Subject | Object |
|---|---|
| gptkb:augite | brittle |
| gptkb:Variscite | Brittle |
| gptkb:Benitoite | brittle |
| gptkb:fairfieldite | brittle |
| gptkb:Limonite | brittle |
| gptkb:Rhodochrosite | brittle |
| gptkb:Fluorite | brittle |
| gptkb:Stibnite | brittle |
| gptkb:Chrysoberyl | brittle |
| gptkb:Mimetite | brittle |
| gptkb:chrysocolla | brittle |
| gptkb:arsenopyrite | brittle |
| gptkb:Smithsonite | brittle |
| gptkb:goethite | brittle |
| gptkb:plagioclase_feldspar | brittle |
| gptkb:Spessartine | Brittle |
| gptkb:Jeremejevite | Brittle |
| gptkb:Jadeite | Brittle |
| gptkb:dioptase | brittle |
| gptkb:gypsum_(CaSO4·2H2O) | flexible |