Flower-like cluster of well crystalized Silver minerals perched on a sparkling white plate of Calcite. Esthetic composition with nice contrast as well. The largest crystals in the cluster are the Pyrargyrites which reach over 8MM and are the flat terminated habit. These are quite dark as almost all red color is gone, but with nice distinct form. The Polybasite crystals are more numerous but smaller, most showing the classic flat hexagonal habit. With a loupe there is some damage seen on the delicate thin edges of some Polybasites, Overall the main Silver specie cluster is excellent by naked eye and a few small balls of Calcite decorate the darker minerals nicely. Ex Charles M. Noll collection his label is included.
Chalcopyrite on Calcite
Concepcion del Oro
9.7 x 7.4 x 6.4 CM (cabinet)
A large scalenohedral Calcite crystal is encrusted with Chalcopyrite crystals many of which are dusted with sparkling drusy Quartz. The Chalcopyrite is mostly coated with dark Bornite patina which makes a strong contrast as well. Aside from a few very small bruises the Chalcopyrite is in fine condition, has classic good form and overall is a very esthetic example from this famed locale. Ex Charles M Noll collection, I have never seen a better example from Concepcion del Oro, and this is a super esthetic Chalcopyrite from anyplace.
A really large, pure Stephanite specimen that shows complex crystal faces on every side. In exceptional condition, besides being large this has a brilliant bright Silver luster. Stephanite is one of more rare Silver minerals and is soft (2-2.5) brittle and so not usually seen in such fine condition.
An older Fresnillo specimen this locality only rarely produced any specimens larger than thumbnails, and for that matter this is a large piece from anyplace. The intergrown sections of crystals are still very sharp with well defined striations and what seems to be many twin planes. A fine addition for a serious Silver suite or Mexican mineral collection.
Calcite- Violet color gem clear
Mina San Martin, San Martin, Municipio de Sombrerete
4.9 x 4.8 x 3.5 CM (miniature)
Glasslike faces with high luster and very sharp edges define this older Mexican Calcite. The crystal is twinned and transparent with fine violet color throughout. The reflective faces makes this hard to show to well in photographs but in person it is striking. The display side of the piece is in fine shape, the bottom and rear are contacted or broken in areas that can be concealed by display angle. otherwise only very tiny edge rubs are found with 10X loupe, this is naked-eye clean and impressive for any Calcite.