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Pearl of Lao Tzu

Pearl of Lao Tzu is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pearl of Lao Tzu rather than just read about it. In short: The Pearl of Lao Tzu was once considered the world's largest known pearl. The pearl was found by a Filipino diver in the Palawan sea, which surrounds the island of Palawan in the Philippines.

Pearl of Lao Tzu — main illustration
Pearl of Lao Tzu — illustration

Key takeaways

  • Pearl of Lao Tzu belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Pearl of Lao Tzu to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Pearl of Lao Tzu from memory before moving on to harder problems.

Reference excerpt

The Pearl of Lao Tzu was once considered the world's largest known pearl. The pearl was found by a Filipino diver in the Palawan sea, which surrounds the island of Palawan in the Philippines. It is not considered a gemstone pearl, but is instead 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 (14.2 lb).

History The only clues as to the pearl's provenance come from Wilburn Dowell Cobb, a visiting US archaeologist from San Francisco, who brought the pearl from the Philippines in 1939 and owned it until his death in 1979. He published an account of how he came to own it in Natural History magazine. According to Cobb, it was found by a diver at Brooke's Point, Palawan. Cobb gave a lengthy, detailed and convoluted account of how he wanted to buy it from a Philippine Dayak 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 Islamic prophet, Muhammad. Cobb then tells of how 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. Three decades later, Cobb embellished the provenance with a new account in the February 1969 Mensa Bulletin, promoting the pearl as an artifact of Chinese legend. He described a 1939 encounter with a Chinese man named Lee, 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 $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 estate. It is not on display to the public and as of 2008 was being held as part of the Manatee County Probate inventory of Victor M. Barbish. The pearl is owned in three equal shares by the heirs of Joe Bonicelli, Peter Hoffman and Victor Barbish.

Value 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. 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 mollusk 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 Francisco, 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, a five-pound non-nacreous pearl then considered the second largest, was offered at auction by Bonhams and Butterfields of Los Angeles on December 6, 2009. Estimated to fetch between $300,000 to $400,000, it passed unsold.

See also Pearl of Puerto

References

Further reading "Chasing the Pearl of Lao Tzu". Atlantic Magazine. May 11, 2018.

External links Chasing the Pearl of Lao Tzu

Illustrations

Pearl of Lao Tzu: Replica of the Pearl of Lao Tzu
Replica of the Pearl of Lao Tzu

Worked examples

Example 1 — a first encounter with Pearl of Lao Tzu

Start with the simplest possible case. Write down what Pearl of Lao Tzu claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pearl of Lao Tzu before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pearl of Lao Tzu ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pearl of Lao Tzu

In research
Pearl of Lao Tzu appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Pearl of Lao Tzu in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Pearl of Lao Tzu is common in secondary-school and first-year university syllabi. It links to neighbouring topics Culture of Palawan, Individual pearls, Mollusc products, so understanding it makes those chapters shorter.
In everyday life
Look for Pearl of Lao Tzu outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Pearl of Lao Tzu in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Pearl of Lao Tzu means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Pearl of Lao Tzu out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pearl of Lao Tzu in simple terms?

The Pearl of Lao Tzu was once considered the world's largest known pearl. The pearl was found by a Filipino diver in the Palawan sea, which surrounds the island of Palawan in the Philippines.

Why does Pearl of Lao Tzu matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pearl of Lao Tzu?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pearl of Lao Tzu.

Tags

  • Culture of Palawan
  • Individual pearls
  • Mollusc products

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