Diamantine
/ˌdaɪəˈmæntiːn/
Definition 1 of 2
Pro Tip 1/3Literary Flair
Used to enhance descriptive language, often in novels or poetry. 
She moved with diamantine grace, akin to a dance.
Pro Tip 2/3Visual Imagery
Invokes an image of brightness and sparkle, think of light reflecting on diamonds. 
The chandelier's diamantine glow filled the room.
Pro Tip 3/3Metaphoric Use
Can be used metaphorically to describe someone with a clear, pure character. 
His diamantine honesty shone through his words.
Compare with
BrilliantFlashGlitterIridescentLuminousRadiantShimmerSparkle
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