GIA Colored Stones Assignment 12:
Ruby Exam Questions and Answers
100% Score Latest update 2026
Ruby can command the highest ______-__________ price of all
colored stones. -
correct answer ✅per-carat
Ruby rates ____ on the Mohs hardness scale, so it's ideal for
frequently worn jewelry. -
correct answer ✅9
The most valuable ruby colors are red to slightly ____________ red
with medium to medium-_______ tones and __________
saturation. -
correct answer ✅purplish, dark, vivid
Not everyone agrees on the _______________ between ruby and
pink, purple, or orange sapphire. -
correct answer ✅division
The trace element ______________ causes rubies to be red, and
can also cause ________________, which intensifies bodycolor. -
correct answer ✅chromium, fluorescence
, GIA Colored Stones Assignment 12:
Ruby Exam Questions and Answers
100% Score Latest update 2026
The finest rubies typically form in ___________ _____________. -
correct answer ✅marble deposits
The higher levels of ______ in basalt-hosted rubies inhibit
fluorescence. -
correct answer ✅iron
Almost all rubies are ________ ___________ to enhance their
color. -
correct answer ✅heat treated
_____________ is the world's largest corundum marketing center,
exporting most of the ___________ commercial quality rubies on
the market. -
correct answer ✅Thailand, faceted
_________________ deals primarily in high-end rubies and
gemstones from other countries. -
correct answer ✅Switzerland
Ruby Exam Questions and Answers
100% Score Latest update 2026
Ruby can command the highest ______-__________ price of all
colored stones. -
correct answer ✅per-carat
Ruby rates ____ on the Mohs hardness scale, so it's ideal for
frequently worn jewelry. -
correct answer ✅9
The most valuable ruby colors are red to slightly ____________ red
with medium to medium-_______ tones and __________
saturation. -
correct answer ✅purplish, dark, vivid
Not everyone agrees on the _______________ between ruby and
pink, purple, or orange sapphire. -
correct answer ✅division
The trace element ______________ causes rubies to be red, and
can also cause ________________, which intensifies bodycolor. -
correct answer ✅chromium, fluorescence
, GIA Colored Stones Assignment 12:
Ruby Exam Questions and Answers
100% Score Latest update 2026
The finest rubies typically form in ___________ _____________. -
correct answer ✅marble deposits
The higher levels of ______ in basalt-hosted rubies inhibit
fluorescence. -
correct answer ✅iron
Almost all rubies are ________ ___________ to enhance their
color. -
correct answer ✅heat treated
_____________ is the world's largest corundum marketing center,
exporting most of the ___________ commercial quality rubies on
the market. -
correct answer ✅Thailand, faceted
_________________ deals primarily in high-end rubies and
gemstones from other countries. -
correct answer ✅Switzerland
