Originally Posted by Newsteel
This remind me of pamor munggul. Most books descibed this occurance due to the presence of titanium or other impurities in the pamor material.
I've read likewise, from my understanding, the type that was explained refers to a small lumpy piece of material, possibly or probably embedded into the piece... some discovered it when the blade was worn down after years of ritual cleansing...
Off-topic a little... I've seen some simbang kurung
, which looked like having a titanium-like inserts, but I cannot be sure whether it is or was it other form of metal. Is there any inserts of this nature ever found to be made of titanium?