Pearl Culture Techniques: Marine and Freshwater Pearls

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What is the main reason for the over exploitation of pearl oysters, leading to the destruction of natural pearl oyster beds?

Increased economic opportunities from pearl culture

Desire to create artificial pearls

Tremendous demand for natural pearls (correct)

High demand for pearl oyster shells

How many oysters out of 2000-10000 are estimated to contain a natural pearl?

1 (correct)

100

500

50

What is the main reason why natural pearls are scarce in nature?

Rare occurrence of natural pearl formation (correct)

High mortality rate of pearl oysters

Natural predators of pearl oysters

Lack of nutrients in the oysters

What is the key difference between marine pearls and freshwater pearls?

Marine pearls are obtained from mussels Signup and view all the answers

What is a notable characteristic of pearls that makes them unique among gems?

They are the only gems produced by living organisms Signup and view all the answers

Why did the demand for natural pearls lead to the short-lived nature of pearl oyster fisheries worldwide?

Depletion of natural stock due to overfishing Signup and view all the answers

What is the main advantage of pearl culture over extracting natural pearls from oysters?

Pearl culture requires no processing to reveal their natural beauty. Signup and view all the answers

Why did the over exploitation of pearl oysters lead to the destruction of natural pearl oyster beds?

The demand for natural pearls led to the over exploitation of pearl oysters from the natural beds. Signup and view all the answers

What is the chance of finding a natural pearl in an oyster in nature?

One in 2000-10000 oysters contains a natural pearl. Signup and view all the answers

Why did the demand for natural pearls lead to the destruction of most natural pearl oyster beds?

The over exploitation of pearl oysters for natural pearls caused the destruction of most natural pearl oyster beds. Signup and view all the answers

What is the main reason for the short-lived nature of pearl oyster fisheries worldwide?

Depletion of natural stock due to over exploitation of pearl oysters. Signup and view all the answers

How does the rarity of natural pearls contribute to the high demand for them?

The rarity of natural pearls makes them highly valuable and sought after. Signup and view all the answers

Pearl Culture Techniques: Marine and Freshwater Pearls

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Questions and Answers

What is the main reason for the over exploitation of pearl oysters, leading to the destruction of natural pearl oyster beds?

How many oysters out of 2000-10000 are estimated to contain a natural pearl?

What is the main reason why natural pearls are scarce in nature?

What is the key difference between marine pearls and freshwater pearls?

What is a notable characteristic of pearls that makes them unique among gems?

Why did the demand for natural pearls lead to the short-lived nature of pearl oyster fisheries worldwide?

What is the main advantage of pearl culture over extracting natural pearls from oysters?

Why did the over exploitation of pearl oysters lead to the destruction of natural pearl oyster beds?

What is the chance of finding a natural pearl in an oyster in nature?

Why did the demand for natural pearls lead to the destruction of most natural pearl oyster beds?

What is the main reason for the short-lived nature of pearl oyster fisheries worldwide?

How does the rarity of natural pearls contribute to the high demand for them?

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