OG Azem (*SPOILERS*)

[Erendis]

Crystals were created by the unsundered after sundering. Since Emet-Selch created Azem's stone in secret, he was the only bearer of the crystal before us.

[Iscah]

Crystals were created by the unsundered after sundering. Since Emet-Selch created Azem's stone in secret, he was the only bearer of the crystal before us.

That much is correct.

The question is whether that was the intent of the scriptwriter or whether (half an expansion since the origins of the crystal were described) they forgot the details of its origins, just went "Azem's crystal" and didn't go back to check.