Phosphate of Lead
- Var. mammillated.
These varieties of Phosphate of Lead should not be passed over, as they, as well as the Carbonates, no doubt, have occasionally been, by many miners who look for Lead, supposing it only of consequence when like Galæna, (see tab. 24.)
The crystallized Phosphates are better known, and being more attracting as curiosities, were preferred in collections. The upper specimen is from the Lead hills; it has much the appearance of Calamine, but is distinguishable by its greater weight, colour, and fusibility. The lower fine specimen is a rare variety from the same place; its colour is very novel; the matrix is principally Quartz.