Is it ok to make also Nitai Nam Vigrahas from (e.g. Metal/Chrystals/Gemstones) and distribute?
Jay Nitai! Pranams prabhuji. Thankyou for the question. It will be answered soon.
I have heard from gurudev , lord comes in manifest in 9 forms and metal is one of them.
There are three varieties of arcana, Deity worship, based on either the original Vedas, the secondary tantras, or a combination of these. The Deity image, the ground, the fire, the sun, the water and the heart of the worshiper are all true locations of the Deity’s presence. The Deity form to be worshiped may be constructed of any one of eight substances-stone, wood, metal, clay, paint, sand (drawn upon the ground), the mind or jewels. These categories are further subdivided into two: temporary and permanent. (Srimad Bhagavatam 11:27)
i would say that with Nitai Nam the material does not matter. More importantly it has to be written correctly.