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GIA COLORED STONE ESSENTIALS QUESTIONNAIRE 2 AND VERIFIED ANSWERS.

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GIA COLORED STONE ESSENTIALS QUESTIONNAIRE 2 AND VERIFIED ANSWERS.

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GIA COLORED STONE ESSENTIALS
QUESTIONNAIRE 2 AND VERIFIED
ANSWERS.
The lightness or darkness of a color is called its ANSWER : -tone



Color is born from an interaction between light, an object, and ANSWER : -an observer



Orient is the term for the iridescence seen in some ANSWER : -pearls



The trade term used to describe orangy red topaz is ANSWER : -imperial



A gem that shows different body colors depending on the viewing direction is ANSWER : -pleochroic



Areas of different color in a gem, caused by variations in growth conditions, is called ANSWER : -color
zoning



Alexandrite shows color change in response to ANSWER : -the type of light



The separation of white light into spectral colors is called ANSWER : -dispersion



The shifting flashes of rainbow hues seen in opals are known as ANSWER : -play-of-color



Each of the colors that make up white light is called a spectral ANSWER : -hue



Gems that display unusual optical effects are classified as ANSWER : -phenomenal

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