Although at first glance the One Ring looked like a normal gold ring, it was immune to all forms of destruction, except fires Orodruin (Mount Doom), the volcano located in the land of Mordor, where it was forged by Sauron. It was possible to identify subjecting it to intense heat, as this form appeared an inscription in black language of Mordor, written in tengwar characters both internal and external face of the ring, symbolizing their power to control the other Rings of Power .
Thetranslation Gandalf the wizard made of this sentence is:
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind.
In the hands of Sauron the Ring was easily recognizable because the intense heat given off by his body was enough for enrollment shine continuously.