For the answer to the question above, <span> the geologists must look closely at the physical properties of a mineral. These properties can include the color, streak, hardness, cleavage, specific gravity, crystal form, and others factors.
I hope my answer helped you
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Among all the countries that you mentioned, Gabon is the country that receives the most rainfall.
Two ways in which the proximity to water has affected Western Europe's economy:
1) Proximity of water can lead to lack of food, which affects economy of the country in various ways.
2) It has wet cool summers and wet, mild winters, so for shelters and cloths, it affects economy by transportation, extra manufacture etc.
Hope this helps!