Where Gemstones Are Found

Where Gemstones Are Found

10 questions · Four options each

1. Which pair of gem minerals does the book say is found worldwide?

Diamond and emerald
Quartz and garnet
Ruby and pearl
Opal and aquamarine

2. According to the book, why are diamonds and emeralds relatively rare?

They occur only in organic materials
They dissolve quickly at Earth’s surface
They are found only in pearl fisheries
Their formation requires unusual geological conditions

3. What does the book say about gem-quality material in a widely found mineral?

Only a minute proportion may be gem quality
All of it is suitable for jewelry
It is always found in pearl farms
It cannot occur in rocks

4. What helps make a place a major gem locality?

The presence of any kind of rock
Its distance from the sea
Enough gem-quality material to make production economical
A history of pearl farming

5. What does the book say about the 12 gem varieties shown on its map?

They are the only gemstones found worldwide
They are well-known gems, but vary in rarity
They are all mined in Japan
They are all organic gems

6. Why does the book connect Japan with pearl farming?

Its kimberlite rocks produce diamonds
Its mountains contain Mogok ruby deposits
Its rivers carry sapphires from southern Africa
Its shallow coastal waters offer suitable conditions for pearl oysters

7. What does the book’s caption say about diamond mining in southern Africa?

Kimberlite rocks are mined on a large scale for industrial and gem diamonds
Diamonds are farmed in shallow coastal waters
Only pearl-quality material is extracted
The deposits are described as worked out

8. Which locality in Myanmar does the book associate with fine rubies?

Japan
Southern Africa
Mogok
Australia

9. Besides rubies, which gem does the text say is also mined in Myanmar?

Pearl
Sapphire
Diamond
Opal

10. Which statement best summarizes the book’s note about gem localities?

Each gem occurs in only one country
All historical sites remain active mines
A gem is economically mined wherever any amount is found
Gems may occur outside the main localities, but deposits may be too small to extract economically