Spectacular combination between fluorite cubes with amazing yellow to green zoning and a lovely perfectly terminated quartz flower.
The fluorite cubes have a very clear \ optical green color and the bigger one has a dark square core, that while it expands it goes by different hues of brown, to  yellow to green until it forms a green vivid square phantom. 
This combination is really unique and rare.

This crystal comes from Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia.