Called a great brahmastra, drawn from 27-28 years of consultancy since 1996-97 with results in 100 out of 100 cases. When volcanic lava cools slowly, the first mineral to set takes the hexagonal form, which is highly energetic. Any zone, however bad, is nullified this way: five offices built in the SSW with quartz all run very well.
Sand also contains quartz (SiO2) of the same chemistry, but in amorphous form, like buttermilk and ghee, both from milk but very different in value. Quartz is called sphatik in Hindi, which is why sphatik Shivlings and Tirthankar idols carry so much power. Fears that quartz is harmful are wrong: people drink the abhishek water of such idols, and spectacle lenses are made of quartz.