Skylight: hidden halo radiant, full pavé band

What this ring is made of

Radiant

A rectangle with trimmed corners but brilliant-style facets, so it has the sparkle of a round in a shape with straight edges. A good choice when she likes rectangles but wants more fire than an emerald cut gives.

Prongs

Small metal claws hold the stone from above. They let in the most light and show the most of the stone, and they should be checked by a jeweler every year or so.

Hidden halo

A ring of small diamonds set under the center stone, visible from the side but not from above. From the top it looks like a plain solitaire.

Pavé all round

Tiny diamonds set flush into the band all the way round, which adds sparkle from every angle but makes the ring harder to resize.

18k white gold

18k white gold is gold alloyed with white metals, usually plated with rhodium for a bright finish. The plating wears off over the years and is renewed at a jeweler’s, which is a small, routine cost.