GemData Welcomes You To

July 1997 Gem Quiz

This is a multiple choice or True/False quiz to test your knowledge of Colored Gemstones, Diamonds and the Gemstone Trade. Choose the best answer for each question from the available answers.

This quiz is to sharpen your skills and expertise of the Gemstone Industry. Sorry, you will not receive any prizes for completing this quiz, just the joy of learning. Have fun.

  1. The gemstone synthetic emerald flux exhibits a characteristic weak band at 427 nanometers?
      True
      False

  2. The specific gravity of serpentine can fall within the range of 2.49 to 2.69 grams per cubic centimeter?
      True
      False

  3. Turquoise commonly can exhibit vitreous luster?
      True
      False

  4. Nephrite is found commonly in a transluscent form?
      True
      False

  5. Refractometer testing for the optic sign of the Cubic gemstone diamond may yield uniaxial positive results?
      False
      True

  6. The refractometer, when used properly with a monochromatic sodium light source, may yield a birefringence value for pearl of 0.183?
      True
      False

  7. The polariscope may yield singly refractive or aggregate results when testing the Cubic gemstone andradite?
      False
      True

  8. Chalcedony is found commonly in a semi-transluscent form?
      True
      False

  9. Almandine is said to have strong dispersion?
      True
      False

  10. The Moh's hardness of amber is approximately 2.1?
      False
      True

  11. Ivory is found commonly in a transluscent form?
      True
      False

  12. The Moh's hardness of calcareous coral is approximately 4.0?
      True
      False

  13. Brown/tan is a color associated with the short wave ultraviolet excitation of the gemstone quartz?
      True
      False

  14. The specific gravity of cubic zirconia can fall within the range of 5.68 to 5.98 grams per cubic centimeter?
      False
      True

  15. The brown, semi-transparent gemstone iolite can exhibit both uneven fracture characteristics and adamantine luster?
      True
      False

  16. The Moh's hardness of jadeite (GIA) is approximately 7.4?
      True
      False

  17. When carefully tested with a dichroscope the Hexagonal gemstone quartz can show a strong trichroic pleochroic response?
      True
      False

  18. The refractometer, when used properly with a monochromatic sodium light source, may yield a refractive index value for the monoclinic, biaxial gemstone diopside of 1.656?
      True
      False

  19. Topaz is said to have very strong dispersion?
      False
      True

  20. When carefully tested with a dichroscope the Orthorombic gemstone chrysoberyl can show a moderate trichroic pleochroic response?
        False
        True

GemData will continue to have a future Gem Quiz each month. Would you like to see your questions used for a future Gem Quiz? GemData will be happy to post the persons name who submitted the question if so desired. Please submit your questions on any subject to do with the Gem, Diamond or Jewelry Industry with the answers to Lance Kanaby at lkanaby@buffnet.net

Copyright 1996-1997 GemData Corp., All rights reserved. Last Updated: Friday, July 4, 1997