Abalone Blister Pearl and clam blister pearl

by syaiful
(Yogyakarta, Indonesia)

While i had a vacation. It was November 2015. I went to one of beach in Java Island-Indonesia. I met a fisherman that he also collected some clams to sell. I was joining with him and his family and friend to collect some clams and shells while i was in vacation. I collected clams and also some old/dry shell. After i brought it to go home. I was surprised that some old/dry shells have small blister pearl that the surface of the texture of the blister pearl looked naturally dried. Here are the photos of the blister pearls. It are 3 blister pearls. One of the three is abalone blister pearl, with small natural measurement. The two pearl are from clam.