We begin by taking raw antimony ore stibnite and crushing it.

 

Then the ore is calcined repeatedly at first its black color remains.

 

Slowly a red hue appears in the ore. But the ore is still as a an uncooked meat and not fit for use in any alchemical work.

 

The red hue grows more distinct and is a sign of the ore nearing completion.

 

Finally the ore becomes a light grey and our work of calcination is almost done.

 

When the ore reaches a light beige color to white is is ready for the next stage of the work