Declension table of ?ratnaratna

Neuter	Singular	Dual	Plural
Nominative	ratnaratnam	ratnaratne	ratnaratnāni
Vocative	ratnaratna	ratnaratne	ratnaratnāni
Accusative	ratnaratnam	ratnaratne	ratnaratnāni
Instrumental	ratnaratnena	ratnaratnābhyām	ratnaratnaiḥ
Dative	ratnaratnāya	ratnaratnābhyām	ratnaratnebhyaḥ
Ablative	ratnaratnāt	ratnaratnābhyām	ratnaratnebhyaḥ
Genitive	ratnaratnasya	ratnaratnayoḥ	ratnaratnānām
Locative	ratnaratne	ratnaratnayoḥ	ratnaratneṣu

Compound ratnaratna -

Adverb -ratnaratnam -ratnaratnāt