Are these sterling silver

ZUNI KACHINA DANCER STERLING RING SIGNED G B NATACHU AND STERLING SILVER NECKLACE. My Mom told me she had met this great woman named Betty and they enjoyed each others company. Ms. Betty before my Mom died (she died of lung cancer) gave my Mother this set and told her she would be free soon. The great thing about this story is my Mom died 2 mo. later without even knowing she had lung cancer. Don’t know if the story is true. But it is one my father still tells today 40 yrs later.

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