Tennantite ps. After Smithsonite stalactite w/ Smithsonite (Rare)

Item Description

Tennantite pseudomorphs after smithsonite are RARE from Tsumeb. This highly unusual and fascinating piece appears to be tennantite after a smithsonite stalactite preferentially accented with a secondary overgrowth of sparkly gray smithsonite rhombs. Not necessarily great to look at, but it is certainly a desirable and rare example of pseudomorphism from this famed locale. Value??