These are Rare Smokey Quartz crystal specimens from Malawi, Zomba Africa. These are large museum quality aren’t seen very often. By far are my favourite specimens I have in the shop! 
Notably, a significant portion of specimens in Zomba displays self-healing characteristics, etching, striations lines and record keepers. 
They all have unique features and inclusions. Some of these deep smokey crystals specimens feature Aegirine inclusions, while rarer inclusions of Riebeckite and rutile, Green Chlorite inclusions and phantoms,
Aegirine within occurs in distinct forms, appearing as either black shiny or green fibrous single crystals or complex clusters, with classic terminations more commonly observed than acicular terminations. 
Each one is unique and most definitely a collectible specimen. 
This exact specimen is 
Weight- 101 
Side-2 inches by 1 inch