You get better result by using specially treated Audiophile grade sand.
There are companies supplying this kind of sand. Sand is procured from some undisclosed sea beaches where no man ever stepped in, totally virgin sand. Then the sand is washed as many as 135 times using holy water from rivers such as Ganges, Yamuna, Tigris, Nile etc. People have reported that Ganges water brings lots of tonal accuracy while Nile water gives much tighter bass.
The washed sand is then dried in Sahara desert. After that the sand is mixed with gold, silver granules and polished in a ball mill. which works in a zero gravity mode. After this the sand is foot rubbed by virgins on a full moon night. This secret process gives the sand those euphoric hifi qualities.
Typically 1 Kg of sand costs Rs 25000 + taxes. Double virgin version costs Rs 65000 per Kg. Sand tech , the world leader in Audiophile sand has a Nirvana variety of sand costing Rs 2,00,000 per Kg and believe me , there is a long waiting list for this sand.
Of course , you must have a very revealing system to hear the difference.
(Just kidding!)