| Singular | sardonyx |
| Plural | sardonychē̆s |
| Singular | sardonychos; sardonychis |
| Plural | sardonychum |
| Singular | sardonychī |
| Plural | sardonychibus |
| Singular | sardonycha; sardonychem |
| Plural | sardonychas; sardonychēs |
| Singular | sardonyche |
| Plural | sardonychibus |
| Singular | sardonyx |
| Plural | sardonychē̆s |