The colorful fine-grained pebbles formed in the Yuhuatai area at Nanjing are "worth a hundred taels of gold" as an ancient saying goes.Yuhua pebbles, souvenirs for tourism, are peculiar to Nanjing.

Yuhua pebbles, solid quality, are precious stones made of a combination of quartz, marrow jade and opal. Learned people are inclined to put Yu Hua pebbles into water basin and then place it on their tables.