Random triples
| Subject | Object |
|---|---|
| gptkb:plagioclase_feldspar | two directions |
| gptkb:Biotite | gptkb:Perfect |
| gptkb:natural_labradorite | perfect in two directions |
| gptkb:Kyanite_Gemstone | gptkb:Perfect |
| gptkb:The_Sodalite | poor |
| gptkb:natural_sunstone | perfect in two directions |
| gptkb:Pyroxene | Two directions |
| gptkb:Hornblende | Perfect in two directions |