Genuine ruby bead on a necklace to prevent miscarriage. According to sources, the Ruby must be un-dyed, in contact with skin at all times, so please wear it underneath clothing. The Ruby is small so it is not noticeably under clothing.
It is 925 Sterling Silver so it is water safe- it can be worn in the shower, pool, etc. If you choose the gold color, it is gold plated over sterling silver so the gold can after a while wear off if worn a lot in water.

Material:  Genuine Ruby (not dyed), 925 Sterling Silver