Understanding the 'Crown of Light' in Diamonds & Jewelry

The "Crown of Light" is not a specific diamond. It's possible you're thinking of one of the following:

* Crown of a diamond: This refers to the top portion of a diamond, above the girdle (the widest part). The crown is usually faceted to create sparkle and brilliance.

* Crown of a tiara: This refers to the top part of a tiara, often adorned with precious gems.

If you can provide more context or details about what you're looking for, I can give you a more specific answer.