Vajra or diamond's adamantine lustre gives a beautiful "fire" or sparkle to the stone.   Value is determined by a grading system that rates color, clarity and weight with lesser value given to cut proportions and surface finish..

Sukra or Venus is harmonized by diamond.  Sukra represents luxuries, romance, partnership wealth, beauty, arts, comforts, jewelry, happiness, and vehicles.  Diamonds are also associated with luxuries, jewelry, wealth, beauty etc.  Sukra or Venus has since antiquity symbollized beauty, not just in material life but inner life as well.  Diamonds high lustre symbolizes the refined liveliness and loveliness of nature within and around us. Sukra or Venus in the human physiology corresponds to the activity of the pars reticulata.  This structure in the physiology refines and controls action in the limbic system related to instincts, feelings and emotions etc.  This action is associated with those impulses in the physiology that correspond to the qualities of life influenced most strongly by Sukra.