Imitation and Enhancement MCQs

 

Imitation and Enhancement: 10 Interactive MCQs

Choose one answer for each question, then select Submit Quiz to see your score and the correct answers.

1. How does the book distinguish an imitation gem from its natural counterpart?

An imitation is always more colorful It may look similar, but its physical properties differ An imitation is always a natural stone It has the same inclusions as every natural gem

2. What is one feature that can help identify a glass imitation?

It is always opaque It has no luster It cannot be made in different colors It may feel warmer, show wear or chipped facets, and contain swirls or bubbles

3. What does “play of color” refer to in opal?

Flashes of color, or iridescence The color of an opal’s base only A pattern of straight growth lines A coating applied to the back of an opal

4. How many pieces make up an opal triplet described in the chapter?

One Two Three Four

5. What is a garnet-topped doublet?

A natural garnet with a glass coating A thin layer of natural garnet cemented to a colored glass base Two natural garnets joined together A synthetic garnet with a protective crystal dome

6. What does the chapter say is the most convincing natural material used to imitate diamond?

Howlite Glass Garnet Zircon

7. What is one treatment used to enhance some gemstones?

Heat treatment to improve or change color or clarity Freezing to remove all inclusions Tumbling with abrasive grit Cutting the stone into a cabochon

8. What can happen to a gem’s color after irradiation, as described in the chapter?

It always becomes permanent and cannot be changed It becomes colorless immediately It may later return toward its original color or fade with time It can only be changed by natural sunlight

9. What is staining used for in the example given?

To make a gem’s surface harder To change the appearance of a porous stone, such as staining white howlite to imitate turquoise To create natural inclusions in a gem To join two pieces into an opal triplet

10. Why is emerald sometimes oiled, according to the chapter?

To make it look like a diamond To change it into a synthetic gem To make it more porous To fill natural cracks and flaws and disguise blemishes