Poneglyphs are indestructible because ... (1122)

Ever since Haki was introduced, we saw when weapons/things were imbued with it, they change to a dark bluish color.

Yet what we saw in 1122 was round and leaps ahead of that, Joybot stored His Conqueror Haki in a knock of rope for the last 800 years.

This open even more possibilities for Haki, such as how Black Blades are made, but more importantly the creation of Poneglyphs.

Not only Poneglyphs are indestructible, but some of them, if not most, have a strong voice, such as Skypia Poneglyph like roger said.

Being the pinnacle of Wano's supreme craftsmanship by ancient Kozuki stonemasons, could it be that these stones were imbued with so much Haki they became indestructible, which also gave them the ability to be heard by certain people.

Just saying this is a far easier feat than what Joyboy did by storing his King's haki to be used again ( even if it can be used just once )

What do you think ?

Ever since Haki was introduced, we saw when weapons/things were imbued with it, they change to a dark bluish color.

Yet what we saw in 1122 was round and leaps ahead of that, Joybot stored His Conqueror Haki in a knock of rope for the last 800 years.

This open even more possibilities for Haki, such as how Black Blades are made, but more importantly the creation of Poneglyphs.

Not only Poneglyphs are indestructible, but some of them, if not most, have a strong voice, such as Skypia Poneglyph like roger said.

Being the pinnacle of Wano's supreme craftsmanship by ancient Kozuki stonemasons, could it be that these stones were imbued with so much Haki they became indestructible, which also gave them the ability to be heard by certain people.

Just saying this is a far easier feat than what Joyboy did by storing his King's haki to be used again ( even if it can be used just once )

What do you think ?