User blog comment:SsVivid/What I Learned From FotG/@comment-5049048-20140325221353

I believe it said somewhere that Mahjarrat (Creatures of Mah, the race, not the tribe) themselves were first created by Mah's dreams before they turned into nightmares.

As result, and from Seren's Memories, it is to be assumed that the gem Mahjarrat keep on themselves is the more divine aspect of them- much like Zaros and Seren themselves, except that Mahjarrat are not completely composed of crystal.

From how I understood it, it was also Seren who first started the traditional Rituals of the Mahjarrat- the Rejuvenation to return strength to Mah, and the Enervation to calm her nightmares (?).

It could well be assumed that Mah did not actually create the Ritual Marker on Freneskae, but rather that Seren did so.