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        | inorganic solids that make up rocks |  | 
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        | How many elements occur naturally in the Earth's crust? |  | Definition 
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        | What is the most common mineral? |  | Definition 
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        | What are silicates made of? |  | Definition 
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 | Definition 
 
        | what a mineral looks like(color) |  | 
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        | scale used to measure the hardness of minerals |  | 
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        | hardest material on the Moh's scale |  | 
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 | Definition 
 
        | softest material on the Moh's scale |  | 
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        | way a mineral reflects light |  | 
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        | ratio of weight of a mineral to the weight of an equal volume of water |  | 
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        | color of mineral in powder form |  | 
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 | Definition 
 
        | mineral that breaks along a plane |  | 
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 | Definition 
 
        | mineral that breaks unevenly |  | 
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        | Term 
 
        | What makes a mineral a gem? |  | Definition 
 
        | Mineral is beautiful and rare |  | 
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 | Definition 
 
        | a rock that contains a useful substance that can be mined for profit |  | 
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 | Definition 
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 | Definition 
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        | Melting a substance to separate it from unwanted materials |  | 
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 | Definition 
 
        | illegally traded diamonds traded to fund conflict in war-torn areas |  | 
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        | Term 
 
        | In what form are conflict diamonds traded? |  | Definition 
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        | Term 
 
        | At one time, what percent of the world's diamond production was represented by conflict diamonds? |  | Definition 
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        | Term 
 
        | Why are conflict diamonds bad? |  | Definition 
 
        | Rebels and war-lords take civilians as slaves to mine the diamonds. |  | 
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        | Term 
 
        | What is the purpose of the Kimberley Process? |  | Definition 
 
        | It is to make it harder to trade conflict diamonds. |  | 
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        | What is the requirement of the Kimberley Process Certification Scheme? |  | Definition 
 
        | Diamonds traded must be mined legitimately. |  | 
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        | Term 
 
        | Why has the scheme not worked as well as they had hoped? |  | Definition 
 
        | Country leaders aren't willing to enforce the Scheme. |  | 
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        | Term 
 
        | What is the problem in Zimbabwe? |  | Definition 
 
        | Traders injury anyone who doesn't agree? help them. |  | 
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