GemData Welcomes You To

April 1997 Gem Quiz

This is a multiple choice 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 specific gravity of almandine can fall within the range of 4.03 to 4.42 grams per cubic centimeter?
      False
      True

  2. Adventurescence is a phenomena associated with the gemstone andalusite?
      True
      False

  3. When carefully tested with a dichroscope the Orthorhombic gemstone peridot can show a moderate dichroic pleochroic response?
      False
      True

  4. Green is a color associated with the short wave ultraviolet excitation of the gemstone quartz?
      False
      True

  5. When carefully tested with a dichroscope the Orthorhombic gemstone chrysoberyl can show moderate dichroic?
      True
      False

  6. The polariscope may yield aggregate results when testing the Hexagonal gemstone quartz?
      False
      True

  7. Violet is a color associated with the short wave ultraviolet excitation of the gemstone corundum?
      True
      False

  8. The green, semi-transparent gemstone fluorite can exhibit both granular fracture characteristics and vitreous luster?
      False
      True

  9. Labradorescence is a phenomena associated with the gemstone opal?
      False
      True

  10. The yellow, transluscent gemstone amber can exhibit both splintery fracture characteristics and pearly luster?
      True
      False

  11. Color Change is a phenomena associated with the gemstone diopside?
      False
      True

  12. Violet is a color associated with the short wave ultraviolet excitation of the gemstone orthoclase?
      True
      False

  13. The Moh's hardness of spinel is approximately 6.8?
      True
      False

  14. Synthetic Corundum Flux is said to have moderate dispersion?
      True
      False

  15. Rhodocrosite commonly can exhibit waxy luster?
      False
      True

  16. The refractometer, when used properly with a monochromatic sodium light source, may yield a birefringence value for corundum of 0.010?
      False
      True

  17. The polariscope may yield doubly refractive results when testing the Hexagonal gemstone calcareous coral?
      True
      False

  18. Calcite is found commonly in an opaque form?
      True
      False

  19. A refractometer, when used properly with a monochromatic sodium light source, may yield a refractive index value for the gemstone hydrogrossular of 1.701?
      False
      True

  20. The gemstone jadeite (GIA) exhibits a characteristic weak line group at 433 nanometers?
      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: Monday, March 31, 1997