Petrographic Microscope: A Case of Etiological Evolution
Petrographic microscope has gone a long way to reach its well-acclaimed optical status and instrumentation’ elegance that it rewardingly savors this day. Way before its construction, polarizing microscopy and other related accessories and inventions were the ones who monopolized the world of microscopic breakthroughs in optical information extraction, and more often than not, get the lion’s share of the mineralogical society’s commendation nod. Though the basic framework of mineral optics was already a shoe-in entry for century-mark mineralogical reviews progress-wise, still the hunt for a better and more quantitative approach of divulging the microstructures of a particular mineral is really much in for microscopes’ evolutionary race. If one is to scroll back then to historic account of mineralogical research, it is very much likely to find out that the creation of petrographic microscope has given a new meaning to the word ‘mineral,’ and there’s much more to offer on the line.
The usual way of depicting the rock’s physical structure as based on pure morphological recordings has been altered and replaced by petrographic experts ingenuity of using methods that reveal and measure the way light travels through and interact with an optically transparent mineral. As such, provision of a basis for correlating the wavelength of the said light with the object’s structure and composition is attained. Further, physics and optics owe much of their present day advancements to the pioneering discoveries unearthed by petrographic microscopes. Mineralogical historians tell that functional prestige and splendor of such microscope was such a mental itch that needs to be practically scratched for those inventors. Aside from the ordinary structural form of the petrographic microscope, they equipped themselves with concepts that would make these types of microscopes in demand not only because of its mineralogical importance but even so in its mere collectible implication for its aesthetic qualities. Be it in terms of microscopic function or just plain beauty and artistry, mineralogical evolution specialists say that it is still worth noting and applauding for since both reflect progressive developments for the petrographic microscope.
Going back to the very creation of the petrographic microscope, certain sort of laps and misnomers were made and recorded. It is to be noted that the termed “petrographic,” in its literal sense, is exclusively attributed to the functional part of the instrument. Mineralogical experts, however, made up with such overlook by casually coining the term within the light of the rock’s graphic texture study. Consequently, one confusion led to another as petrographic microscopes, has at many times, been pulled apart between two closely associated adverbs in the words “petrologic” and “petrographic.” To clear this out, microscopists came up with distinctive definitions that drew the borderline between these two. It was established that the term petrology refers to a wide range study of a particular rock origin, history and alteration, with a much leeway for interpretation rooted from subjective impulses and personal understandings. In contrast, the bounds of the functions of microscope at the scope of petrography are differentiated with its restrictive nature in the microscopic endeavor, as it encompasses the description and classification of mineral assemblages. Consequently at the end, however, since the microscope is a tool of optical examination, measurement and identification, the contemporary ‘petrographic microscope’ was brought to life and not its petrological rival.
