Remington Halo Engagement Ring (setting only) - Soha Diamond Co.™
All Halo Rings (BASE) - Secret Woods
In Halo 3, when Truth fires all the Halo rings, there is a destroyed one, that does not light. This would be the Halo ring you destroyed in the first game. :
Square Diamond Promise Halo Ring in 10k White & Rose Gold - Shop Online on Rogers & Hollands
18K White Gold 3 Row Diamond Round Halo Ring | Wedding Day Diamonds