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زمینشناسی و معدن::
نمونه معدنی
Increasingly, new mining methods which crush ore underground permit fewer undamaged mineral specimens to reach the surface.
Our understanding of earth history and processes is derived as much from detailed analyses of rock and mineral specimens as from the study of geological formations and structures.
As soon as a mineral specimen is recovered from its terrestrial setting and transferred to a storeroom, it is brought into a new environment, which serves to protect it from certain natural agencies; extremes of temperature and pressure, solution, biological action and prolonged radiation.
Clearly for mineral specimens as natural chemical compounds there is very limited scope for remedial conservation.
Such is the nature of mineral specimens that It is easier to find small fine specimens than larger ones, and indeed many species only occur as microcrystals.
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