My conclusion. Intense Black this is not.
Intense Black should NOT go purple.
And black rods priced at an arm and a leg shouldn't go purple.
From the top - core of clear, layer of black, encased clear; white cylinder base, trails of black, black on ends; white base, trails of black - heat till it starts to rotate, mash. All of these show purple - this is pretty definitive - this is not intense black.
If you recently bought Intense Black Rods - do a test bead before you do a production run of 30 beads, m-kay?