50th wedding anniversary gifts. The Light color precious sphere is a concretion formed by a mollusk. And this mainly in the addition of marks reflecting the proportion of pure aurum in both karats and percent. The day of remembrance is the celebration of the day on which an important event happened in a previous year. The commencement is a ceremony at which an official document saying that he has got a degree will be given to him. So, this gray precious metal has long been. The Light color precious.