posted by kila .
1)give two properties of gold which makes it an economically valuable mineral
2)what is the difference between gold and an ordinary rock?
3)what is difference between gold mine and gold prospect?
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1) you can do from general knowledge
or see http://en.wikipedia.org/wiki/Gold
2) is an interesting question as you need to define the property, before you can state a difference. For example gold is very much more dense than 'ordinary' rock (what ever that is), so there is a big difference. Both 'ordinary' rock and gold are found naturally in the ground, so there is no difference in the source.
3) see http://www.thefreedictionary.com/goldmine