[1]: 311 Mohs indicated an unequal-sided tetrahedral pyramid as the main crystalline form for antimony luster, and its cleavage, no doubt, was very perfect — axotomic (according to the basic definition of a mineral).
It occurs in masses of considerable dimensions in Cornwall, sometimes along with the di-prismate Copperglance.”[3]: 27 Ten years later, James Dana, in his new system of mineralogy, returned to the question of the composition and properties of this mineral, calling it jamesonite or axotomic antimony glance.
Among the properties of the mineral, James Dana especially notes a typical analytical reaction: “before the blowpipe, in an open tube, it affords a dense white smoke of oxyd of antimony”.
Having indicated the detailed percentage composition of the content of individual elements in the mineral (according to Heinrich Rose), however, he does not provide a formula, noting that jamesonite “it occurs principally in Cornwall, associated with quartz and minute crystals of Bournonite”.
At the end there is a short explanation from the field of analytical chemistry: “