- Madeline Platinum .36CT T.W. Canadian Diamond Accented Solitaire Engagement RingUS$ 1,200.00Total diamond weight .37ct1/4 carat diamond simple and elegante 18k and platinum solitaire for ladiesUS$ 1,088.00Total diamond weight .23ctPurity classic straight 1/6 carat diamond platinum solitaire for ladiesUS$ 1,050.00Total diamond weight .21ct