'Fiery' in the Bible

Beloved, do not be surprised at the fiery ordeal which is taking place to test you [that is, to test the quality of your faith], as though something strange or unusual were happening to you.

And He who sat there appeared like [the crystalline sparkle of] a jasper stone and [the fiery redness of] a sardius stone, and encircling the throne there was a rainbow that looked like [the color of an] emerald.

And this is how I saw the horses and their riders in my vision: the riders had breastplates [the color] of fire and of hyacinth (sapphire blue) and of brimstone (yellow); and the heads of the horses looked like the heads of lions; and from out of their mouths came fire and smoke and brimstone (burning sulfur).

People were [severely] burned by the great heat; and they reviled the name of God who has power over these plagues, but they did not repent [of their sin] and glorify Him.

And the beast (Antichrist) was seized and overpowered, and with him the false prophet who, in his presence, had performed [amazing] signs by which he deceived those who had received the mark of the beast and those who worshiped his image; these two were hurled alive into the lake of fire which blazes with brimstone.

And the devil who had deceived them was hurled into the lake of fire and burning brimstone (sulfur), where the beast (Antichrist) and false prophet are also; and they will be tormented day and night, forever and ever.