What are the unique properties of Agni Mani stones according to Adam Ringham?

The available content here does not include anything written about Agni Mani stones, so cannot honestly list specific properties or claims attached to them in work.

Agni Mani is typically discussed in broader esoteric circles as a high-fire, transformational stone, but that is general lore, not specific to .

Could you share where you saw mention Agni Mani (post, video, or quote)?