Declension table of ?ratnaka

Masculine	Singular	Dual	Plural
Nominative	ratnakaḥ	ratnakau	ratnakāḥ
Vocative	ratnaka	ratnakau	ratnakāḥ
Accusative	ratnakam	ratnakau	ratnakān
Instrumental	ratnakena	ratnakābhyām	ratnakaiḥ ratnakebhiḥ
Dative	ratnakāya	ratnakābhyām	ratnakebhyaḥ
Ablative	ratnakāt	ratnakābhyām	ratnakebhyaḥ
Genitive	ratnakasya	ratnakayoḥ	ratnakānām
Locative	ratnake	ratnakayoḥ	ratnakeṣu

Compound ratnaka -

Adverb -ratnakam -ratnakāt