Lilac is one of the prettiest and freshest colours in jewellery so this oval tanzanite and 020 total carat weight shoulder set diamond engagement ring in 9 carat white gold is the perfect ring to flatter any bride mined in the foothills of mount kilimanjaro rare tanzanite takes on different hues according to the light alternately flashing azure blue burgundy and violet and this ring is especially attractive thanks to the interplay between the shades of the tanzanite and the clear sparkle