FREE SCIENCE AND STUDY GAMES ABOUT GIA COLORED

PDF Download

FREE SCIENCE AND STUDY GAMES ABOUT GIA COLORED

STONES EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -408 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Asterism in black star sapphire is caused by

• tubes.
• hematite.
• twinning planes.
• copper platelets.

Answer:

• Hematite

Question 2: A snakeskin structural pattern is typical of

• synthetic opal.
• imitation lapis lazuli.
• flame-fusion synthetics.
• hydrothermal synthetic quartz.

Answer:

• Synthetic opal

Question 3: Which treatment can create a golden color from black coral?

• Coating
• Heating
• Bleaching
• Irradiation

Answer:

• Bleaching

Question 4: When a gem's crystal structure splits light into two rays that each travel at a slightly different speed and direction, it's called

• diffraction.
• interference.
• single refraction.
• double refraction.

Answer:

• Double Refraction

Question 5: Which transition element causes a greater variety of gem colors than any other?

• Iron
• Cobalt
• Vanadium
• Chromium

Answer:

• Iron

Question 6: A number of similar cultured pearl strands bundled together is called a

• hank.
• mabé.
• bushel.
• pearl sac.

Answer:

• Hank

Question 7: The pattern of dark vertical lines or bands shown by certain gems when viewed through a spectroscope is called

• refraction.
• dispersion.
• pleochroism.
• absorption spectrum.

Answer:

• Absorption Spectrum

Question 8: The adularescence of the finest moonstones is

• blue.
• green.
• purple.
• yellow.

Answer:

• Blue

Question 9: The world's largest gem-consuming market is

• Japan.
• Europe.
• Thailand.
• United States

Answer:

• United States

Question 10: In the nineteenth century, a major source of amethyst was discovered in

• Brazil.
• Russia.
• Burma.
• Zambia.

Answer:

• Brazil

Question 11: Most opal formed

• 15 to 30 thousand years ago.
• 150 to 300 thousand years ago.
• 15 to 30 million years ago.
• 150 to 300 million years ago.

Answer:

• 15 to 30 million years ago

Question 12: What is the only type of gem that can show pleochroism?

• Faceted
• Phenomenal