A term used to describe something that has the qualities or appearance of a diamond, such as brilliance or hardness.

हीरा जैसी विशेषताएं या रूप

English Usage: The necklace was made of diamantine crystals that sparkled in the light.

Hindi Usage: यह हार हीरा जैसी क्रिस्टलों से बना था जो रोशनी में चमक रहा था।