The garnet group includes a group of minerals that have been used since the Bronze Age as gemstones and abrasives. It is a key mineral in interpreting the genesis of many igneous and metamorphic rocks via geothermobarometry. Diffusion of elements is relatively slow in garnet compared to rates in many other minerals, and garnets are also relatively resistant to alteration. Hence, individual garnets commonly preserve compositional zonations that are used to interpret the temperature-time histories of the rocks in which they grew. Garnet grains that lack compositional zonation commonly are interpreted as having been homogenized by diffusion, and the inferred homogenization also has implications for the history of the host rock.

Garnet sand is a good abrasive, and a common replacement for silica sand in sand blasting. Mixed with very high pressure water, garnet is used to cut steel and other materials in water jets. Garnet sand is also used for water filtration media. There are different kinds of abrasive garnets which can be divided based on their origin. The largest source of abrasive garnet today is garnet rich beach sand which is quite abundant on Indian and Australian coasts.

Rock garnet is perhaps the garnet type used for the longest period of time. This type of garnet is produced in America, China and western India. These crystals are crushed in mills and then purified by wind blowing, magnetic separation, sieving and if required, washing. Being freshly crushed, this garnet has the sharpest edges and therefore performs far better than other kinds of garnet. Both the river and the beach garnet suffer from the tumbling effect of hundreds of thousands of years which rounds off the edges.

Garnet has been mined in western Rajasthan for the past 200 years, but mainly for the gemstone grade stones. Abrasive garnet was mainly mined as a secondary product while mining for gem garnets and was used as lapping and polishing media for the glass industries.

The mind-body dichotomy is the view that mental phenomena are, in some respects, distinct from the body. In a religious sense, it refers to the separation of body and soul. The mind-body dichotomy is the starting point of Dualism, and became conceptualized in the form known to the modern Western world in René Descartes’ philosophy, though it also surfaced in pre-Aristotelian concepts and in Avicennian philosophy.

Plato argued that, as the body is from the material world, the soul is from the world of ideas and thus immortal. He believed the soul was temporarily united with the body and would only be separated at death where it would then go back to the world of forms. As the soul does not exist in time and space like the body, it can access universal truths from the world of ideas.For Plato, ideas are the true reality, (in terms of the Platonic forms) and are experienced by the soul. Experience is not relevant to this, so the body is given no real part in reality. The body is for Plato empty in that it can not access the abstract reality of the world; it can only experience shadows. This is determined by Plato’s essentially rationalistic epistemology.

This view of reality leads one to consider the corporeal as little valued and trivial. The rejection of the mind-body dichotomy is found in French Structuralism, and is a position that generally characterized post-war French philosophy. The absence of an empirically identifiable meeting point between the non-physical mind and its physical extension has proven problematic to dualism and many modern philosophers of mind maintain that the mind is not something separate from the body. These approaches have been particularly influential in the sciences, particularly in the fields of sociobiology, computer science, evolutionary psychology and the various neurosciences.