the tantra temples of khajuraho in india is situated on the top of diamond mines.the diamond is connected with sex or shukra graha in hindu astrology.very interesting thing about diamond is that it is the only hardest metal on the earth and it vanisheses totally when heat up 768 degree celsious without leaving any ash or anything.,in spiritialty it is connected with truth which is eternal or which never changes as it never changes its form diamond also never changes its form . . and very mysteriously in ayurveda diamond bhasma is used for treating cancer.my understanding is that cancer is connected with past life karmas .so diamond ,tantra and cancer has deep connection.diamonds,tantra can be very helpful in treating cancer and healing the past life karmas.in great hindu epic mahabharat krishna talks about playfullness. if you are here and now not thinking about future or PAST your life becomes a leela OR A GAME then you dont creat a karma. ,bhagwan krishnas message is very clear that if you are here and now you will not creat any karma.you become a vehicle for god .and then life becomes a leela or a game and if we are in our mind or in our ego we are creating more karmas.so connecting with krishna conciousness is necessary to avoid the karmas and to live playfully