A brilliant cubic crystal of galena with octahedral modifications on sphalerite crystals from the amazing Polaris Mine (see below). This is a great specimen, in excellent condition (the main crystal has a couple of small contacts that are away from the main display angle and a hairline cleave line that ends at the matrix, where  […]

A group of beautiful, sharp galena crystals with small crystals of dolomite in association. The galena crystals are bright cubes with tiny octahedral modifications at the corners. In excellent condition, a couple of minor surface growth imperfections. From the Steve Szilard collection, a sweet galena from an amazing locality (see below).   About Steve Szilard […]

Very sharp, clean, deeply-striated pyrite crystals from Nanisivik.  These are cubes and elongated cubes – really nice crystals. In excellent condition, a couple of tiny rubs at periphery on the left. From the Steve Szilard collection, a very fine specimen of cubic pyrite from the Nanisivik Mine. About Steve Szilard (click here) ______ About the Nanisivik […]

This specimen features good sphalerite crystals from the Nanisivik Mine, along with some beautiful complex pyrite crystals. The sphalerite crystals are nestled into a protected area on the piece. The pyrite crystals are wonderful, and they are epitactic on pyrite-replaced marcasite. The crystals are in excellent condition, and the crystals around the periphery and underneath […]

Beautiful complex pyrite crystals from Nanisivik. These crystals combine cube, octahedron, dodecahedron and trapezohedron forms – they have a LOT of faces! (Great illustrations of this in the article referred to below.) The crystals are oriented in the manner of many Nanisivik pyrite crystals – they are epitactic on pyritized marcasite (so they are in […]

This piece features a central blade (and some lesser ones as well) of pyrite pseudomorphs after marcasite, together with dolomite. The blades are replaced by finely crystalline pyrite and with magnification one can see that some of the pyrite has a cool, almost skeletal look to it. The dolomite crystals are typical composite rhombohedra and […]

This is a beautiful combination specimen from Nanisivik, with dolomite crystals perched on sphalerite crystals, and coated with a sprinkling of both pyrite and marcasite crystals. In excellent condition – no damage. From the Steve Szilard collection, an aesthetic piece! About Steve Szilard (click here) ______ About the Nanisivik Mine The Nanisivik Mine is in […]

Here’s something one almost never sees – beautiful sharp chalcopyrite crystals from the Nanisivik Mine. Chalcopyrite crystals of this size and calibre were rare at the mine. The crystals are razor-sharp with good lustre and some iridescence. There is a nice golden calcite crystal nestled in among the chalcopyrite crystals. In very good condition, minor […]

This is quite a specimen – there is a lot going on here – it does not fit in the title! The  rhombohedral dolomite crystals have a layer of calcite microcrystals on them, and on top of the calcite is a dusting of tiny sparkling sharp marcasite and pyrite crystals. There is a beautiful bladed […]

A beautiful crystal of microcline (var. amazonite) from Lake George, Colorado.  This crystal has selective deposition of white albite on certain faces, contrasting with the greenish blue. The termination is super, with great form and nice lustre (as seen in the fourth photo). In excellent condition. From the Pete Richards collection, acquired by him in […]