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Antimony is a naturally forming element and metalloid that is found predominantly as sulfide mineral stibnite and has been used by humans for thousands of years.

The characteristic transverse striae, invariably present on the cleavage surfaces of stibnite and cyanite are due to secondary twinning along glide-planes, and have resulted from the bending of the crystals.

We have been in much doubt as to the term to introduce into the text, as the English "stibnite" carries too much precision of meaning.

For the preparation of metallic antimony the crude stibnite is first liquated, to free it from earthy and siliceous matter, and is then roasted in order to convert it into oxide.

The antimony sulphide, stibnite, is the source of most of the world's production of this metal.