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When using the chart, it is important to remember these tips: Isotropic and opaque (metallic) minerals cannot be identified this way. The stage of the microscope should be rotated until maximum colour is found, and therefore, the maximum birefringence. Each mineral, depending on the orientation, may not exhibit the maximum birefringence.
Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [ 1 ]
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Associated rock type; With what rock type and/or other minerals is this mineral found? Degree of metamorphism and alteration; Mineral shape, properties or form been altered. Lattice structure and geochemistry; Signature chemical elements and bonds of the mineral. For example, is the mineral hydrous like mica or non hydrous like Jadeite.
Download as PDF; Printable version; ... This is a list of minerals which have Wikipedia articles. ... identifying and displaying mineral specimens;
Michel-Lévy interference colour chart issued by Zeiss Microscopy. Michel-Lévy pioneered the use of birefringence to identify minerals in thin section with a petrographic microscope. He is widely known for the Michel-Lévy interference colour chart, which defines the interference colors from different orders of birefringence.