Declension table of ?śyāmāratna

Neuter	Singular	Dual	Plural
Nominative	śyāmāratnam	śyāmāratne	śyāmāratnāni
Vocative	śyāmāratna	śyāmāratne	śyāmāratnāni
Accusative	śyāmāratnam	śyāmāratne	śyāmāratnāni
Instrumental	śyāmāratnena	śyāmāratnābhyām	śyāmāratnaiḥ
Dative	śyāmāratnāya	śyāmāratnābhyām	śyāmāratnebhyaḥ
Ablative	śyāmāratnāt	śyāmāratnābhyām	śyāmāratnebhyaḥ
Genitive	śyāmāratnasya	śyāmāratnayoḥ	śyāmāratnānām
Locative	śyāmāratne	śyāmāratnayoḥ	śyāmāratneṣu

Compound śyāmāratna -

Adverb -śyāmāratnam -śyāmāratnāt