Question

question 1
what three conditions must be present for minerals to form through natural processes?
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question 2
whats the main difference between metallic and nonmetallic luster in minerals?
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question 3

Explanation:

For Question 1: Minerals form through natural processes when there are the right elements available, appropriate physical - chemical conditions (such as temperature, pressure), and sufficient time for crystallization.
For Question 2: Minerals with metallic luster look like metals, are shiny and reflective like a metal surface, while non - metallic luster minerals lack this metallic - like shine and can have various appearances such as glassy, pearly, or earthy.

Answer:

Question 1: Availability of elements, appropriate physical - chemical conditions, sufficient time for crystallization.
Question 2: Metallic luster is like a metal's shine and reflectivity; non - metallic luster lacks this and has other appearances like glassy, pearly, or earthy.