Carbonate of Copper

The present specimen is a very rare and curious modification of carbonate of copper.

At present I know of only two specimens; one belonging to P. Rashleigh, Esq., and the other in the possession of Mr. R. Phillips.

The upper figure, which belongs to the former gentleman, is, as he observes, remarkable for being on the broken end of a large milky rock crystal. The other stands on the crystallized ends of the rock crystal, and is a much larger specimen; part of it only being figured.

This mineral was first considered as an arseniate of copper, but we have every reason to suppose it to be a carbonate.

The spiculæ are curiously disposed like radii round the edges of a thickish lenticular nucleus.

Both specimens are accompanied by a few crystals of each variety of arseniate of copper, figured at tab. 31.