GIA Colored Stones Exam COMPLETE NEWEST QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR

Page 1 of 187




GIA Colored Stones Exam COMPLETE NEWEST

QUESTIONS AND VERIFIED SOLUTIONS LATEST

UPDATE THIS YEAR


QUESTION: The 4 most representative Opal Formation models are the Weathering theory, the

Microbe theory, the ________ theory, and the _______ theory. - ANSWER-Syntectonic and

Redox




QUESTION: ________ opal—Background color ranges from translucent white to medium gray;

shows play-of-color - ANSWER-White




QUESTION: _________ opal—Background ranges from transparent to semitransparent; shows

exceptional play-of-color - ANSWER-Crystal




QUESTION: Precious opal displays characteristic flashes of rainbow colors, called play-of-color,

while _______ opal—also known as potch opal—does not. _________ opal, which can occur in

attractive colors that make it highly desirable to consumers, is more widespread than precious

opal. - ANSWER-common


1

, Page 2 of 187




QUESTION: ________ opal (Jelly opal)—Background ranges from transparent to translucent;

shows faint play-of-color or no play-of-color at all - ANSWER-Water




QUESTION: _________ ________ —The cultured pearl shows evidence of its bead nucleus

through the nacre - ANSWER-Nucleus Visible




QUESTION: ________ Luster - Reflections are bright but not sharp and slightly hazy around the

edges (Pearls) - ANSWER-Good




QUESTION: GIA groups Pearl bodycolors into three types: - ANSWER-Neutrals, Near-Neutrals, &

Hues




QUESTION: An appealing ________ can make a gem much easier to sell - ANSWER-Name




QUESTION: Changes that take place in gem's ____________________ can drastically affect its

availability and price - ANSWER-Source Country



2

, Page 3 of 187




QUESTION: ____________ improve the marketability and availability of many gems. - ANSWER-

Treatments




QUESTION: In spite of treatment that is sometimes extensive, _________ is the number one

colored stone by value imported into the US. - ANSWER-Emerald




QUESTION: Many consumers accept _____________________ if they're ethically disclosed and

explained in a positive way. - ANSWER-Gem Treatments




Q; Most _____ are minerals - ANSWER-Gems




QUESTION: Chrysocolla-in-chalcedony sources include the __________ & _____________ -

ANSWER-United States and Mexico




QUESTION: Fine-quality agate comes from Mexico, Brazil, and __________ - ANSWER-Uruguay




3

, Page 4 of 187


QUESTION: _____ agate is a lovely phenomenal variety of agate. It's semitransparent to

translucent and shows iridescent colors when light is transmitted through thin slices. -

ANSWER-Iris




QUESTION: To be gem, a _____ must be beautiful, durable, and rare - ANSWER-Mineral




QUESTION: ______ ____ agate, commonly called southern red agate in the trade; usually has

intense red, white, or grayish color bands. - ANSWER-Chinese red




QUESTION: There are two broad opal categories: _________ and _________ - ANSWER-

precious and common




QUESTION: Lacking a regular crystal structure - ANSWER-Amorphous




QUESTION: The basic structure of all matter - ANSWER-Atom




4