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Cordierite: Quiz

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Question 1: Two common metamorphic mineral assemblages include sillimanite-cordierite-spinel and cordierite-________-plagioclase-orthopyroxene.
SpinelCorundumRubyChromite

Question 2: [4][5] Cordierite also occurs in some ________, pegmatites, and norites in gabbroic magmas.
GraniteFelsicIgneous rockBasalt

Question 3: Cordierite typically occurs in contact or regional ________ of argillaceous rocks.
Metamorphic rockMetamorphismAmphiboliteGranulite

Question 4: As the transparent variety iolite, it is often used as a ________.
DiamondGemstoneGarnetQuartz

Question 5: A high temperature polymorph exists, indialite, which is isostructural with ________ and has a random distribution of Al in the (Si,Al)6O18 rings.
BerylEmeraldUnited StatesTourmaline

Question 6: ________ are commonly made from ceramics containing a large proportion of cordierite.
Catalytic converterInternal combustion engineAutomobileSpark plug

Question 7: Cordierite occurs in the granite contact zone at Geevor Tin Mine in ________.
BristolCornwallWiltshirePlymouth

Question 8: Other associated minerals include garnet (cordierite-________-sillimanite gneisses) and anthophyllite.
TourmalineGarnetDiamondQuartz

Question 9: Cordierite (mineralogy) or iolite (gemology) is a magnesium iron ________ cyclosilicate.
TitaniumAluminiumGoldCopper







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