Jim & Dawn Minette Collection Here’s another unique Tsumeb specimen. Dark green malachite after azurite pseudomorphs are placed on a shallow dome of matrix covered with pale green drusy smithsonite. The specimen was part of the Roebling Collection at the US National Museum. Jim and Dawn Minette got this specimen from Bill Larson in 1971 for $200. I guess times have changed a lot in the last 40 plus years.