These new information is... interesting.
First things first. There is no confirmation that the Beledar is some calcification, it was a question asked by Dagran.
But let's look back, When we were in Hallowfall with Anduin he remarked that the light crystals used by the Arathi are similar to Azerite, but not quite the same. Anduin had Azerite in hand when it first appeared, so he should notice if it is the same (the vison of power to create and destroy he got when touching it). Next, we know from Gallywix that the tip of his staff, was azerite, and since Gallywix had Azerite on his staff before the sword, the gold and blue hue of it is not from whatever sargeras did.
So, Then why is Azerite gold and blue, but the Beledar only golden and turns purple, not blue. Which should mean, they are not the same. But, they can still be related.
We know of the origin story of the universe from chronicles. Sure, titan pov yadda yadda. But, the shards of light that started all life could still be a true thing. So, where do worldsouls come from in the first place? According to that story, maybe every world soul IS a shard of light. But don't light turn to shadow automatically? Like the Beledar?
Well, not all Shadow is the same. With TWW we saw some very interesting color choices for some things. Old god shadow is purple-magenta colored, so more into the red spectrum. While Xal'atahts shadow is more pure purple and less red. But then we also have cosmic voids shadow, which is distinctively blue. We can see that perfectly in these icons for some crafting materials. Also note the names given to these icons.
inv_nullstone_shadow
inv_nullstone_void
inv_nullstone_cosmicvoid
So. What if, world souls, are shards of light, but alsoww void? This would perfectly explain the color of azerite of being gold for light, and blue for cosmic void. So, how does the Beledar fit in here? The beledar might also be a shard of light, but a smaller one. And a smaller shard might not be able to turn into a world soul, but the next best thing, Naaru. Naaru, we know, communicate in song like fashion. Like the Radiant Song. We also know, that Elune is supposedly the "mother" of the prime naaru. Now, Elune is always connected to the moon, and also seems to have a shadow side. This all could be connected. The bigger the shard of light, the more powerful a being is. Perhaps Elune is from a bigger shard of light, but not quite a world soul. This let's me think of a hierarchy of power which could explain a few things, but others are still open and need more information.
[LIST][*]Prime Shard of Light - Prime World Soul - Azeroth[*]World Shard of Light - World Soul - Titans, Argus, Sargers[*]Moon Shard of Light - ??? - Elune[*]Star Shard of Light - ??? - Beledar (same or above Prime Naaru?)[*]Mayor Shard of Light - Prime Naaru - X'era[*]Minor Shard of Light - Naaru - A'dal and .