Which planet and metal belong to each direction, and why place that metal there?
In Vedic vastu each direction represents a planet: East is the Sun (gold and copper), South-East is Venus (white metal), South is Mars (copper), South-West is Rahu-Ketu (panchdhatu), West is Saturn (iron), North-West is the Moon (silver), North is Mercury (kansa and brass) and North-East is Jupiter (gold and brass). The planets cannot be held in a fist, but their energy can be deposited in the home: the material representing a direction's planet captures that planet's energy there, multiplies it, raises the power of the place and nullifies negative energy.
Related questions
Does it matter in which direction silver, iron or other metals are placed underground?
No. Direction rules for metals apply above the ground, where the cosmic energy of the planet's location acts, not underground. If they applied underground, silver would be found only in the North-West, gold only in the East and iron only in the West. Iron rods are laid through the whole slab anyway, so cutting a zone with an iron strip means nothing; learn vastu with logic and science.
How are silver and gold added to a dowsing rod?
On a Guru Pushya or Ravi Pushya yoga, have a goldsmith mix them into the copper and make the rod. If that cannot be done, take ready-made rods and have silver and gold fixed at their solid point.
Can a brass pendulum be used for dowsing?
Yes. Pendulums can be metallic or non-metallic, and brass can be used because it contains copper.
Can all the doors and windows of the house be made of steel?
Yes, if Saturn is exalted in your chart. The same thing that harms one person can benefit another.
Do the directions of the kundli houses shift when the rashis or planets in them change?
No. The 4th house is always North, the 1st East, the 10th South and the 7th West, with the sub-directions between them. Like water flowing in a river, planets and rashis keep moving, but the direction a house represents stays fixed whichever planet or rashi comes into it.
Each house of the kundli has a rashi in it. Does the rashi decide the direction?
No, the rashi plays no role here. The 4th house is North, the 1st house East, the 10th house South and the 7th house West, with the sub-directions in between. Real charts are then analysed, five a day from the student group, to decide each person's interior; the key is knowing what to do for exalted planets and what for debilitated ones.