CORUNDUM
Corundum is a very valuable mineral and it comes in many different colors.
CORUNDUM’S PROPERTIES
Color: Frequently gray, but also white, red, blue, yellow, and green.
Streak: Colorless.
Luster: Vitreous* and pearly.
Hardness: 9 on the scale. It is harder than topaz and quartz, but softer than diamond
and moissanite.
*Vitreous: Glassy
IT’S CRYSTAL SHAPE
Corundum has a hexagonal shape.
WHERE YOU CAN FIND CORUNDUM
Corundum can be found in metamorphic and volcanic rocks in places like Burma,
Thailand, and Sri Lanka.
THE FORMULA OF CORUNDUM
The formula of corundum is AI203. (Aluminum Oxide)
FUN FACTS
•
Did you know that a red corundum is a ruby and a blue corundum is a sapphire?
•
Corundum has no cleavage.
•
Corundum is the 3rd hardest mineral.
•
It was named "corinvindum" in 1725 by John Woodward. Richard Kirwan used the
current spelling "corundum" in 1794.
RESOURCES USED
http://geology.com/minerals/
http://www.ask.com/question
http://www.answers.com/
http://answers.yahoo.com/question
CREDITS
Presented and created by: Helen and Elizabeth.
Helpers: Asad Soomro, Ben Rosenfeld, and Luke Capello.
Properties
Where is it
found?
Moh’s Scale
Random
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BONUS
WHAT IS CORUNDUM’S STREAK?
Click for Answer
COLORLESS
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WHAT IS CORUNDUM’S LUSTER?
Click for Answer
VITREOUS(GLASSY) AND PEARLY
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WHAT IS CORUNDUM’S USUAL COLOR?
Click to Answer
USUALLY GRAY
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TRUE OR FALSE: CORUNDUM IS FOUND IN
BURMA.
Click for Answer
TRUE
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IS CORUNDUM FOUND IN
METAMORPHIC/VOLCANIC ROCKS OR IN
SEDIMENTARY ROCKS?
Click for Answer
METAMORPHIC/VOLCANIC ROCKS
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TRUE OR FALSE: SRI LANKA IS ONE PLACE
CORUNDUM IS FOUND.
Click for Answer
TRUE
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TRUE OR FALSE: CORUNDUM IS 9 ON THE
MOH’S SCALE.
Click for Answer
TRUE
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DAILY
DOUBLE
See Problem
WHAT 2 MINERALS ARE HARDER THAN
CORUNDUM?
Click for Answer
DIAMOND AND MOISSANITE
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WHAT NUMBER IS CORUNDUM ON THE MOH’S
SCALE?
Click for Answer
9
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WHAT MINERAL IS NUMBER 8 ON THE MOH’S
SCALE?
Click for Answer
TOPAZ
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WHAT IS A RED CORUNDUM CALLED?
Click for Answer
RUBY
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CORUNDUM’S SHAPE IS…
Click for Answer
HEXAGONAL
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TRUE OR FALSE: CORUNDUM IS THE 3RD
HARDEST MINERAL.
Click for Answer
TRUE
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WHAT IS CORUNDUM’S FORMULA?
Click for Answer
AI203 (ALUMINUM OXIDE)
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