A true Kavacha or “talisman” is not only the gem, which represents the earth element. A real Astral Talisman is composed of all 5 elements, i.e., gem for earth, herb for water, metal for fire, symbol for air, and cosmic number for space. This process of “Pancha-amrita” astral talisman making is the most bona fide. Even the Western alchemists are known to use herbs as the “water” ingredient in an Astral Talismans. These herbs have been ritually turned into “bhasma” or sanctified ashes. Therefore, one may understand that the gem alone is not the complete kavacha or talisman, the gems are only for one of five elements, viz., earth
The philosopher Agrippa has nicely described in Three Books of Occult Philosophy the basic preparation of astrological rings as follows:
“When any star ascends fortunately we must take a stone and HERB that is under that star, and make a ring of the metal that is suitable to this star, and in it fasten the stone, putting the herb or root under it, not omitting the inscriptions of images, names and characters, as also the proper suffumigations.