Archon (hardstone)

Archon was a valuable hardstone found in Faerûn. It was also called Blue John.
==Description==
Archon was a low-grade fluorspar that was blue to purple and banded with white. Large specimens were used for carving because it was soft and easy to work. A typical price was 2 gp per lb (0.45 kg).
==Powers==
Archon gave off a faint greenish glow if a magically invisible creature or object came within 20 ft (6.1 m). This hardstone was only sensitive to magical invisibility, not creatures on the Ethereal plane or merely in disguise.
==Appendix==
===See Also===
* Fluorspar
===Notes===
===External Links===
* 
===References===
Category:Hardstones
Category:0-24 gold pieces
Category:Items from Faerûn
Category:Items from Toril
Category:Items