Corundum - see how well you know this gem!

Let's see how much you have learned from watching and reading up on Corundum!  

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* 1. First Name

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* 2. Last Name

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* 3. eMail 

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* 4. Phone 

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* 5. What is the red variety of corundum called?

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* 6. The most valuable color in sapphire is?

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* 7. Corundum is what hardness on the Moh's hardness scale?

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* 8. Ruby is the birthstone for what month?

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* 9. Blue sapphire gets its color from what elements? 

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