Mineralogical notes. No. II. Topaz, barite, anglesite, cerussite, and zircon
Since a description and figures of topaz crystals from Emmaville was published, Mr. D. A. Porter has presented to the Trustees the specimen represented in PI. xviii., Fig. 1. It is a typical and finely developed example of the crystalline habit of topaz from this locality, and, as it is somewhat larger than the best crystals hitherto examined, it is possible to represent the faces in approximately their actual relative proportions.