Brilliance Diamond

Introducing Brilliance Diamond®

Bella Cosa Jewelers is proud to introduce our very own signature diamond collection - Brilliance Diamond®. We have gone through thousands of Gemological Institute of America (GIA) and American Gem Society (AGS) graded loose diamonds and we have hand-selected the ones that meet our extremely strict standards.

Shop Loose Diamonds

What Makes a Diamond a Brilliance Diamond®?

AGS 000

AGS Triple Zero is the highest cut grade that an AGS certified diamond can achieve. An AGS 000 means the diamond has an ideal "0" for symmetry, polish, and proportions.


GIA Triple Ex diamonds represent the highest cut grade that GIA awards. With Excellent polish, symmetry, and cut grades, Triple Ex diamonds have the best grades for these specifications of cut.

Strict Standards

TABLE: 55% - 60% DEPTH: 59% - 62.5%
None or Faint Fluorescent
No brown, grey or green tints of color
No extremely thin or very thin girdles
No knots
No cloudy or milky diamonds

Ethically Sourced

All Brilliance diamonds are conflict-free and ethically sourced. At Bella Cosa Jewelers, we only purchase from suppliers that adhere to the Kimberley Process and are concerned about the ethical and social issues that surround diamonds.

AGS Triple Ideal

GIA Triple Excellent

Strict Standards

Additional Requirements

Ethically Sourced

What comes with your Brilliance Diamond®?

GIA Certificate

Each Brilliance Diamond® is accompanied by a GIA grading certificate.

AGS Certificate

Each Brilliance Diamond® is accompanied by an AGS grading certificate.

Lifetime Buyback

We will buy back any Brilliance Diamond® for any reason, at any time*

*This policy applies to ONLY the purchaser and is not transferable. The diamond must be in original condition and accompanied by any reports and/or certificates. Does not include the original sales tax paid.