A breach is material if, as a result of the breaching partyâs failure to perform some aspect of the contract, the other party receives something substantially different from what the contract specified.
In mineralogy, crystal habit is the characteristic external shape of an individual crystal or groups of crystals. A single crystal's habit is a description of its general shape and its crystallographic forms, plus how well developed each are.Recognizing the habit may help in identifying a mineral.or example, minerals used for asbestos insulation often grow in a fibrous habit, a mass of very fine fibers. The terms used by mineralogists to report crystal habits describe the typical appearance of an ideal mineral.
Amethyst is also found in igneous, and certain metamorphic rocks, as those contain enough radioactive trace elements for a sufficient irradiation of the crystals. Amethyst from sedimentary rocks is very rare, and the crystals are usually very pale in color.As the ubiquitous iron is built into the crystal lattice, amethyst is sometimes found in ore deposits. However, to be built into the quartz crystal lattice, the iron needs to be present as Fe, and not as Fe.methyst from a druse with goethite, FeOOH, inclusions, Rio Grande do Sul. As mentioned earlier, inclusions of iron minerals can frequently be found in amethyst. The crystals have well developed prism faces, which is not common on amethyst from volcanic druses, and show a patchy distribution of color.