Black Jelly Beans?

Black stones at the base of the water fountain where you wash your hands at a Japanese Shinto shrine.
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black stones: 黒い丸い石
at the base of 〜: 〜の麓
water fountain: 噴水式水飲み場
where you wash your hands: 手を清める場所
Shinto shrine: （神道の）神社