Jeffrey Post, curator of the Smithsonian’s National Gem and Mineral Collection, says the size of the Dom Pedro Aquamarine is ... into anonymous stones for jewelry. The largest piece escaped ...

This has been dated from 1850 and came as part of a Northumbrian estate's possessions. The top of the ring is decorated with five pale blue aquamarines. Aquamarine is a blue variety of 'beryl'.

You should take care and never store your aquamarine jewelry next to a gem that has a harder surface. These stones should also only be washed in warm water, not hot water, and avoid any hard ...