The characteristics of these two popular worktop materials are similar in many respects, but there are some aspects that you should be aware of.
Granite is a natural material, mined from the earth and fabricated into worktops, gravestones, monuments, sculptures, building materials etc. Because it is a natural material, basically quartz stone, it requires some work to create a finished product: machining, polishing, waxing and sealing. At the end of the process you get an individual worktop that is unique and often beautiful that should last for many years.
The price for granite is generally determined by its rarity and not the quality. The higher the price, the rarer the material, but the characteristics remain virtually identical. Because granite has a waxed, polished and sealed surface there is always a possibility that this protective barrier may break down, which may result in staining, but this is rare. Granite is supplied in slabs and the maximum size without a joint varies with fabricator and granite type. However, joints are generally no wider than a thin pencil line and sealed against all eventualities. Granite is heat resistant and stain resistant and waterproof to a high degree. Granite is practical in every sense of the word but can chip and scratch; however, it is extremely hardwearing. It is easy to clean and maintain the original good looks. It can be machined in different shapes with radii and angles. It can be used for splashbacks, window sills, skirting board and architrave; flooring, threshold strips, feature panels, wall tiles and so on. It is ideal for pastry and other food preparation tasks. There is no real solid evidence that natural granite emits radiation to a dangerous level, as has been reported from time to time.
Quartz Composite worktops have the same basic characteristics as natural granite but the main differences are: Quartz Composite worktops are manmade granite, therefore consistent in colour, finish and thickness. There are no additional waxing and sealing processes, so there is no surface finish to break down. Price is determined by the complexity of the manufacturing process and this varies from make to make; there is no discernable difference in quality.