DCA Gemology Study Set Colored Gemstone Course Latest Update 2025-2026 Exam 100 Questions with 100% Verified Correct Answers Guaranteed A+
A common treatment for blue sapphire is - CORRECT ANSWER: Heating
A dinner-style ring with a large center gem surrounded by tapered baguette diamonds in
a radial pattern is called a - CORRECT ANSWER: Ballerina ring
A mineral type defined by the combination of chemical composition and crystal structure
is - CORRECT ANSWER: a species
A pearl's color can have up to three separate components- bodycolor, overtone and -
CORRECT ANSWER: Orient
A standard step in the processing of Akon's and Chinese freshwater cultured pearls is -
CORRECT ANSWER: Bleaching
According to consensus, the color with the most emotional punch is - CORRECT
ANSWER: Red
According to FTC guidelines, the term "platinum" may be used without qualification if
the fineness is at least - CORRECT ANSWER: 950
According to legend, opal is the luckiest and most magical of all gems because it -
CORRECT ANSWER: Displays all colors
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According to researchers, most people can distinguish between more than how many
colors? - CORRECT ANSWER: 7 million
After a customer makes a purchase, he or she should receive a satisfaction call in about
- CORRECT ANSWER: 30 days
All true gemstones possess beauty, rarity and - CORRECT ANSWER: Durability
Amber is a form of - CORRECT ANSWER: Fossilized resin
Amethyst, aquamarine, chrysoberyl, citrine, moonstone, tourmaline, topaz and
spessartite garnet are among the gems that often form in - CORRECT ANSWER:
Pegmatites
Ammolite is a type of fossilized shell that can display - CORRECT ANSWER:
Iridescence
Archeological digs in Europe have found ivory carved - CORRECT ANSWER: 30,000
years ago
At Brazil's largest imperial topaz mine, from every 8,000 tons of ore the total weight of
topaz recovered is about - CORRECT ANSWER: 66 pounds
Australia is the world's leading producer of - CORRECT ANSWER: Opal
Colored gemstone jewelry represents about what percentage of sales for many jewelry
retailers> - CORRECT ANSWER: 10%
Colored gemstones offer traditional retailers a competitive advantage because they usually require - CORRECT ANSWER: Personalized presentations
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