Random triples
| Subject | Object |
|---|---|
| gptkb:baryte | brittle |
| gptkb:siderite | brittle |
| gptkb:Sphalerite | Brittle |
| gptkb:Chrysoberyl | brittle |
| gptkb:tanzanite | brittle |
| gptkb:chalcosite | brittle |
| gptkb:strontianite | brittle |
| gptkb:Franklinite | brittle |
| gptkb:Pyroxene | Brittle |
| gptkb:pyrite | brittle |
| gptkb:Hemimorphite | brittle |
| gptkb:Stilbite | brittle |
| gptkb:Bowenite | tough |
| gptkb:Chalcopyrite | brittle |
| gptkb:Millerite | brittle |
| gptkb:Potassium_feldspar | Brittle |
| gptkb:Wulfenite | Brittle |
| gptkb:pumpellyite-(Fe3+) | brittle |
| gptkb:Spessartite | Brittle |
| gptkb:thomsonite-Ca | brittle |