Round Diamond Hidden Halo Engagement Ring LR2350Simon G.'s LR2350 leads with understatement with its slim pav band in 18k yellow gold with a hidden diamond halo tucked beneath the center stone. The 1. 8mm shank keeps the silhouette modern and wearable across occasions, from a low key engagement dinner to a long weekend away. A half eternity diamond ring that feels like a discovery every time someone notices the detail underneath.