Exam (elaborations)
GIA Colored Stones Assignment 24_ Garnet and Spinel
- Module
- Journalism 190 Test #2.
- Institution
- Journalism 190 Test #2.
GIA Colored Stones Assignment 24_ Garnet and Spinel
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GIA Colored Stones Assignment 24:Garnet and Spinel
1600's - ANS-Pyrope has been mined in the Bohemian Hills of the Czech Republic
since the __________. (Still manufactures Victorian style jewelry with tiny stones to this
day.)
1900's - ANS-In the ________ orange garnets entered the market in great numbers.
1900's - ANS-In the __________ elaborate, gem-studded jewelry fell out of fashion.
Production declined as different styles took over. Pyrope demand never really recovered
after that.
1967 - ANS-Tsavorite was discovered in Tanzania in _______.
1990's - ANS-New discoveries of spessartine in the ___________ made it much more
available.
1990's - ANS-Nigerian spessartine deposits were discovered in the ________.
20 - ANS-There are more than _______ garnet species, but only five are commercially
important as gems. (pyrope, almandine, spessartine, grossular, and andradite, +.5
uvarovite) PAAGSU
350 - ANS-A second large spinel in the Crown Jewels is called the "TImur Ruby." It
weighs over _________cts. It bears Persian inscriptions carved into it to testify to its
age.
Africa - ANS-___________ features red spinel deposits in Tanzania (Morogoro) by ruby
and a range of hues in Madagascar (Ilakaka) by sapphire.
Africa - ANS-Most garnets come from sources in A_________.
Africa, Sri Lanka - ANS-Color change garnets from A________ (Tanzania/Madagascar)
and S____ L________ are strong red under one light source and green, or even blue,
under another.
, almandine - ANS-A___________ is possibly the most widespread garnet (found on
every continent). Occurs most typically in metamorphic rock like schist. (Myanmar,
Thailand, Brazil, Tanzania, and Mozambique.) (Large sizes exceeding 2-3 inches)
almandine - ANS-Spessartine ahs a lighter tone than a___________ so while its large,
faceted garnets are almost always too dark, large spessartines can be exceptionally
beautiful.
almandine, pyrope - ANS-Rhodolite is a mixture of ____________ and _____________.
almandine, pyrope, spessartine - ANS-The trade term malaya is used for a pinkish
orange garnet that's a mixture of a_________, p___________, and
s________________.
almandine, rhodolite - ANS-Star garnets usually occur in a____________ or
r_____________. Four-rayed stars are common. (India, Sri Lanka, and Idaho) (not as
rare as color-change)
aluminum, calcium - ANS-There are two garnet groups: A____________ and
C____________.
andradite, chromium, iron - ANS-Demantoid, the transparent green variety of
a_____________, is colored by a mixture of c___________ and i_________.
anthill - ANS-Arizona and Utah pyropes were dubbed "__________" garnets in the
1990's. (found near anthills)
asterism - ANS-As with star corundum, tiny needles of rutile cause _____________ in
some garnets.
Balas - ANS-Known as "__________ ruby," spinel was not recognized as a separate
gem species until the 1800's.
black - ANS-Cutters use many methods to breathe life into large often nearly
__________ garnets. Examples include: hollowbacks, foil backings, and shallow
proportions.
Black Prince's ruby - ANS-____________ ____________ _________ is one of the most
famous examples of a Balas ruby (spinel). It is a historic crimson-red gem, set in
England's Imperial State Crown and displayed in the Tower of London (170-cts.).
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