GO 340 Gemstones & Gemology
ES 567 Gemstones of the World
Emporia State University
Dr. Susan Ward Aber


Test Your Knowledge!

What will I learn from this course? Check out what you already know about gemstones by taking the quiz below. Touch the highlighted phrase for the answers...

  1. What is the responsible for the red color of a ruby?
  2. Which gemstone changes color from red to green?
  3. Although yellow or brown is the usual color for topaz, which color is the most valuable?
  4. In relation to gemstones, what do the terms such as square, half Dutch rose, and briolette mean?
  5. Where is the world's largest cut colorless diamond located?
  6. What gem, if worn as an amulet, is said to protect against drunkenness?
  7. Which gemstone was commonly used in rings, cameos, cylinder seals, and drinking vessels over 3,000 years ago in Egypt?
  8. When were diamonds first synthesized?
  9. Is there a difference between carat, karat, and carrot?
  10. Gold, copper, zinc, nickel, & palladium are alloyed to create what color of gold?

Answers to Test your Knowledge!

1. Ruby, a variety of corundum, is a pure red with a hint of blue or a slightly purplish-pink tint to the red. Chromium is responsible for making ruby red. return for question two
2. Alexandrite, a variety of chrysoberyl, is deep green in daylight and light red in artificial or incandescent light. Chromium and the crystalline structure are responsible for making alexandrite both green and red! return for question three
3. Natural pink colored topaz is the most valuable of the many colors possible. Topaz can be pink, colorless, yellow, red-brown, violet, light green and blue. Although blue topaz is common in jewelry today, very little is natural. It has been synthesized since 1976, and yellow topaz is heat treated to create blue. return for question four
4.Different cuts of gems. return for question five
5. The British Crown Jewels, housed in the Tower of London, include the largest cut, colorless diamond, named the First Star of Africa. This gem is a part of the head of the Scepter of King Edward VII, but can be removed and worn as a brooch. The diamond is 530.20 carats, fashioned in 1908 from the largest rough ever found, 3106 carats. return for question six
6. Amethyst actually means "not drunken" and is believed to protect the wearer from drunkenness. return for question seven
7. Agate is banded, concentric fine-grained chalcedony, which cooled and crystallized within vesicles or voids in volcanic rock and was one of the earliest fashioned gem. return for question eight
8. Diamonds were first synthesized in the mid 1950s in Sweden and the U.S. It was not until the 1970s that gem quality rough was successfully created. return for question nine
9. Carat is a weight measure for gems (1 carat = 0.2 gram); karat is a quality measure for metals (24 karat = 100% pure gold); carrot is a vegetable! return for question ten
10. White gold.

How many did you get correct?

Return to the Syllabus.

This page originates from the Earth Science department for the use and benefit of students enrolled at Emporia State University. For more information contact the course instructor, S. W. Aber, e-mail: esu.abersusie@gmail.com Thanks for visiting! Webpage created: 1999; last update: August 14, 2012

Copyright 1999-2012 Susan Ward Aber. All rights reserved.