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Clearly Crystals Trivia Quiz

This quiz covers some of the basic information on crystals and crystal formation. It's a good place to begin if you'd like to understand the dazzling world of crystalline minerals.

A multiple-choice quiz by AElfwynn. Estimated time: 4 mins.

Author
AElfwynn

Time
4 mins

Type
Multiple Choice

Quiz #
166,167

Updated
Dec 03 21

# Qns
10

Difficulty
Tough

Avg Score
6 / 10

Plays
1519

Last 3 plays: Guest 163 (6/10), Guest 74 (7/10), PurpleComet (7/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Crystal structure is the geometric arrangement of the atoms of a mineral.

True

False

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Question 2 of 10

2. Crystals are usually recognized by their natural flat surfaces called _______. Hint

facets

faces

tables

plates

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Question 3 of 10

3. Crystals can be extremely tiny or larger than a washing machine.

True

False

NEXT>

Question 4 of 10

4. All crystals belong to one of six systems of symmetry. One system, the Hexagonal, has two divisions. It also differs from the other five by the number of axes. How many axes does it have? Hint

NEXT>

Question 5 of 10

5. Where can gem quality crystals be found? Hint

marble

pegmatic dike

all of these

gravel beds

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Question 6 of 10

6. All crystals are transparent or translucent.

True

False

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Question 7 of 10

7. The correct term for the process of crystal enlargement is __________. Hint

growth

multiplication

gestation

expansion

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Question 8 of 10

8. Beryl crystals produce both emeralds and aquamarines.

True

False

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Question 9 of 10

9. Rutile incorporated in corundum crystals produces: Hint

worthless scrap

quartz

commercial abrasive

stars

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Question 10 of 10

10. A doubly terminated quartz crystal found in New York State is called a ________________ diamond.

Answer: (One Word - 8 letters, starts with H)

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Most Recent Scores

Apr 25 2024 : Guest 163: 6/10
Apr 17 2024 : Guest 74: 7/10
Apr 15 2024 : PurpleComet: 7/10
Apr 10 2024 : Guest 86: 5/10
Apr 08 2024 : Guest 77: 5/10
Apr 07 2024 : Guest 82: 5/10
Apr 03 2024 : Guest 38: 5/10
Mar 28 2024 : Guest 110: 5/10
Mar 15 2024 : Guest 82: 6/10

Score Distribution

Quiz Answer Key and Fun Facts

1. Crystal structure is the geometric arrangement of the atoms of a mineral.

Answer: True

The atoms of a crystal are linked by chemical bonds that hold the mineral together in a regular geometric pattern that repeats in three dimensions. The atoms can be one or more of the 92 known naturally occurring chemical elements.

2. Crystals are usually recognized by their natural flat surfaces called _______.

Answer: faces

Faceting is the process of cutting a gem stone to reveal the full beauty of transparent minerals.

3. Crystals can be extremely tiny or larger than a washing machine.

Answer: True

Large well formed crystals need sufficient space so their development will be unimpeded.

4. All crystals belong to one of six systems of symmetry. One system, the Hexagonal, has two divisions. It also differs from the other five by the number of axes. How many axes does it have?

Answer: 4

The systems are defined by the number, length, and angles of the axes. The systems are: Hexagonal, Isometric, Tetragonal, Orthorhombic, Monoclinic, and Triclinic. The last five have three axes. Some sources classify the two divisions of Hexagonal as separate systems, adding Trigonal, thereby making seven.

5. Where can gem quality crystals be found?

Answer: all of these

The most important sources are in sedimentary deposits; a special type of igneous body (the pegmatic dike); and some metamorphic rocks. The gem-mining areas of the world are limited in number.

6. All crystals are transparent or translucent.

Answer: False

Many minerals such as amazonite, galena and staurolite form opaque crystals.

7. The correct term for the process of crystal enlargement is __________.

Answer: growth

Growth occurs when the temperature, pressure, chemical environment and space available are favorable.

8. Beryl crystals produce both emeralds and aquamarines.

Answer: True

The color varieties of beryl include: emerald (green), aquamarine (blue, blue-green), morganite (pink, pale yellow-orange), goshenite (colorless) and heliodor (yellow, orange). Emeralds weighing more than several carats are extremely rare and costly, the finest and largest coming from South America.

9. Rutile incorporated in corundum crystals produces:

Answer: stars

When cut as a cabochon, light is reflected from the rutile needles producing a six-rayed star. These star sapphires and rubies can be quite large and spectacular. The Rosser Reeves star ruby weighs 138 carats; and the Star of India blue star sapphire weighs in at 563 carats.

10. A doubly terminated quartz crystal found in New York State is called a ________________ diamond.

Answer: Herkimer

Quartz is one of the most common minerals in the earth's crust, and produces many different semi-precious gems like amethyst, rose quartz and tiger's eye.

Source: Author AElfwynn

This quiz was reviewed by FunTrivia editor crisw before going online.
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