Optical dating of granite stone surfaces
Granite is nearly always massive (i.e., lacking any internal structures), hard, and tough.
These properties have made granite a widespread construction stone throughout human history.
When a granitoid is devoid or nearly devoid of plagioclase, the rock is referred to as alkali feldspar granite.
When a granitoid contains less than 10% orthoclase, it is called tonalite; pyroxene and amphibole are common in tonalite.
A worldwide average of the chemical composition of granite, by weight percent, based on 2485 analyses: Granite rock in the cliff of Gros la Tête – Aride Island, Seychelles.
The thin (1–3 cm wide) brighter layers are quartz veins, formed during the late stages of crystallization of granitic magmas.
A granite containing both muscovite and biotite micas is called a binary or two-mica granite.
Two-mica granites are typically high in potassium and low in plagioclase, and are usually S-type granites or A-type granites.
Like granite, soap is not recommended for regular cleaning since residue will build up and leave a dull film.
The average density of granite is between 2.65 and 2.75 g/cm Granite is classified according to the QAPF diagram for coarse grained plutonic rocks and is named according to the percentage of quartz, alkali feldspar (orthoclase, sanidine, or microcline) and plagioclase feldspar on the A-Q-P half of the diagram.
True granite (according to modern petrologic convention) contains both plagioclase and alkali feldspars.
Also, many people prefer a uniform pattern that is exactly the same over the entire surface. Cost is not really an issue when comparing to granite since you'll pay about the same for engineered stone.
Quartz countertops from all the brands are a snap to clean.