Small hemispherical pearls with one flat side. Blister pearls occur when the pearl is formed between the mussel tissue and the hard outer mollusk shells. Sometimes blister pearl are sliced from a bump in the shell nacre.
Sources Checked for Data in Record
- Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
- Encyclopedia Britannica, http://www.britannica.com Comment: "Pearl." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service. 13 May 2004 .