An order from the Elder

Donovan placed the octagon-shaped stone on Luciano's hand while the other Elder vampire stared hard at the dull-looking stone. 

"Are you fucking with me, Azazel?" questioned Luciano, his eyes snapping to look at Donovan and glaring at him. "This is a stone."

"I know," came the solemn reply from Donovan, who kept a straight face. "I found it on my way to Veteris and as you seem to have taken such an interest in it. I think you should have it. Consider it as a Christmas present." 

"Why does the stone have a similar shape as the dark stone?" questioned Luciano, bringing the opaque looking stone in front of his face. 

"Looks like you have quite some knowledge about the dark stone, Lucy. Trying to find one for yourself?" 

Luciano thoroughly inspected the stone and said, "Not as much as how you are looking for it and have been working alongside the Mortimers. And I am not a child to not know about the dark stone."