Heinrich accurately determines the value of the items he examines. His experimentation also reveals that the unidentified potion is of the healing variety as well.
The holy symbol matches one of the obscure deities that used to be worshiped in Venza, a benevolent one that favored acts of charity and reducing bigotry. Ausk knows people used to worship that god, but no longer, a testament to the current trends in the city of glass. But such a deity would definitely not be worshiped by Githyanki or goblinoids.