Solitaire diamond ring with a 0.25 carat diamond from our collection BlackThis solitaire diamond ring is handmade from 14K rose gold with a 0.25 carat black diamond. The Diamond have a diametre from approximately 4.00mm.The black diamond have a eye-clean surface.The gold surface is highly polished.This diamond ring is in 14K and 18K white gold, rose gold and yellow gold available.