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.
Pegmatite is an igneous rock composed almost entirely of crystals that are over one centimeter in diameter. The specimen shown here is about two inches (five centimeters) across. A crystal of imperial topaz on an allbite matrix from a pocket in the Katlang Pegmatite of Pakistan.ome of the world s best tourmaline, aquamarine and topaz deposits have been found in pegmatites. Large crystals in igneous rocks are usually attributed to a slow rate of crystallization. However, with pegmatites, large crystals are attributed to low-viscosity fluids that allow ions to be very mobile.