Pearl of Lao Tzu
The Pearl of Lao Tzu (also referred to as Pearl of Lao Tze and previously as Pearl of Allah) is the largest known pearl in the world. The pearl was found in the Palawan sea, which surrounds the island of Palawan in the Philippines, and was found by a Filipino diver. It is not considered a gemstone pearl, but is instead what is known as a "clam pearl" or "Tridacna pearl" from a giant clam. It measures 24 centimeters in diameter (9.45 inches) and weighs 6.4 kilograms (14.1 lb).
The pearl came from Brooke's Point, Palawan in the Philippines. Wilburn Cobb, an American who brought the pearl from the Philippines in 1939 and owned it until his death in 1979, published an account of how he came to own it in Natural History magazine. According to Cobb, he wanted to buy it from a Philippine tribal chief when he first heard of it in 1934, but the chief, a Muslim, did not want to sell because he considered the pearl sacred, in part because of its resemblance to the turbaned head of the Prophet Muhammad. However, Cobb relates, he saved the life of the chief's son, who was stricken with malaria, in 1936 and was given the pearl as a token of gratitude. Because of its sacred associations, the pearl came to be known as the Pearl of Allah.
Much later, Cobb wrote a new account in the February 1969 Mensa Bulletin, this time promoting the pearl as an artifact of Chinese legend. He alleged he had been approached by a Chinese fellow named Li, who told him that the pearl had first been grown in a much smaller clam around a jade amulet inserted by a disciple of the legendary sage Laozi more than 2,500 years ago, and been transferred over the centuries to ever larger clams, growing to record size. Wars had supposedly been fought over the artifact, and it had been sent off to the Philippines as a protective measure, where it was lost in a storm.
After Cobb's death in 1979, Peter Hoffman and Victor Barbish bought the pearl from his estate for the much smaller sum of $200,000. Barbish has claimed to have had further contact with other Li family members. (The legend of a "Pearl of Laozi", however, is only known from the claims of Cobb and Barbish.)
When Victor Barbish borrowed money from a Joseph Bonicelli, he gave him an interest in the pearl. In 1990, Bonicelli took Barbish to court to collect his loan, and the court ruled that Hoffman, Barbish and Bonicelli were equal partners in the pearl. Bonicelli died in 1998, and after more legal proceedings, the court ordered the pearl to be sold (it has not been), with a third of the money going to Bonicelli's chi
The pearl is not on display to the public and is currently held as part of the probate inventory of Victor M. Barbish. The pearl is presently owned in three equal shares by the heirs of Joe Bonicelli, Peter Hoffman, and Victor Barbish.
While biologists would regard this object as a kind of pearl, gemologists regard it as a non-nacreous pearl, lacking the iridescence of the pearls that come from saltwater pearl oysters and freshwater pearl mussels. The interior of a giant clam has no nacre (mother of pearl); instead it is porcellaneous, like a china plate. Because of its great size, a giant clam can create a very large pearl, but not an iridescent, gemlike one. The Gemological Institute of America (GIA) and CIBJO now simply use the term "pearl" (or, where appropriate, the more descriptive term "non-nacreous pearl") when referring to such items, rather than the term "calcareous concretion" and, under U.S. Federal Trade Commission rules, various mollusc pearls may be referred to as "pearls" without qualification.
Gemologist Michael Steenrod in Colorado Springs has appraised the pearl at $60,000,000 (1982) and $93,000,000 (2007). Another 1982 appraisal, by Lee Sparrow who owned a gem laboratory and appraisal business in the Phelan Building in San Franciso, put the pearl at $42,000,000.
In America, the pearl was exhibited at the Ripley's Believe It or Not! Odditorium in New York, valued at $35,000,000
The Palawan Princess, considered the second largest pearl, was offered at auction by Bonhams and Butterfields of Los Angeles on December 6, 2009. Though the five pound pearl was estimated to bring $300,000 to $400,000, it was not sold.
- Wilburn Dowell Cobb (November 1939). "The Pearl of Allah". Natural History.
-  Probate of Victor M. Barbish / Manatee County, Florida
- The Pearl Book, International Jewellery Confederation.
- GIA Gems & Gemology magazine news archive
- Guides for the Jewelry, Precious Metals, and Pewter Industries
- Palawan Princess - 5 Pound Pearl - Up for Auction, karipearls.com, December 6, 2009.
- Auction catalog beginning with lot no. 2377, Bonhams Natural History Auction, December 6, 2009, Bonhams Auction House.
- Sale Results, Sale 17535, Natural History, December 6, 2009, Bonhams Auction House.
- http://www.mysinchew.com/files/preview/292x300..08115.jpg Bottom half of clam shell on display in Brooke's Point, Palawan.
- Famous pearls