corundum

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 100 200 300 BONUS

What is corundum’s Streak? Click for Answer

Colorless Back to Chart

What is corundum’s luster? Click for Answer

Vitreous(Glassy) and pearly Back to Chart

What is corundum’s usual color? Click to Answer

Usually gray Back to Chart

True or false: corundum is found in Burma. Click for Answer

True Back to Chart

Is corUNDUM FOUND IN METAMORPHIC/Volcanic rocks or in sedimentary rocks? Click for Answer

Metamorphic/volcanic rocks Back to Chart

True or false: sri lanka is one place corundum is found. Click for Answer

true Back to Chart

True or false: corundum is 9 on the moh’s scale. Click for Answer

True Back to Chart

Daily double See Problem

What 2 minerals are harder than corundum? Click for Answer

Diamond and moissanite Back to Chart

What number is corundum on the moh’s scale? Click for Answer

9 Back to Chart

What mineral is number 8 on the moh’s scale? Click for Answer

Topaz Back to Chart

What is a red corundum called? Click for Answer

Ruby Back to Chart

Corundum’s shape is… Click for Answer

Hexagonal Back to Chart

True or false: corundum is the 3rd hardest mineral. Click for Answer

True Back to Chart

What is corundum’s formula? Click for Answer

AI203 (aluminum oxide) Back to Chart