Detailed Description This is a fine pseudomorph of goethite after marcasite, with well-defined crystals all around – lustrous and a very dark brown, virtually black. Of the many habits of these White Desert pseudomorphs, my friend Tracy Kimmel used to call this the “mace head” habit. In excellent condition and with good lustre, as the […]

Detailed Description This is a fine pseudomorph of goethite after marcasite, with well-defined crystals all around – lustrous and a very dark brown, virtually black. Of the many habits of these White Desert pseudomorphs, my friend Tracy Kimmel used to call this the “mace head” habit. In excellent condition, a couple of chips that are […]

Detailed Description This pseudomorph of goethite after marcasite has a cool habit we see in a few specimens, where there is an appearance of an overall pseudo-octahedral shape – and in this case, two. This piece also features  small, rounded aggregates of cuboctahedral pyrite pseudomorphs, perched on the marcasite pseudomorphs.  It is very brown, virtually […]

Detailed Description This pseudomorph of goethite after pyrite, with three main compound-growth cubes. It is dark brown  and the crystals are moderately lustrous, polished by the blowing sands of the White Desert. The crystals show oonly very minor rounding from the natural sand polishing. In excellent condition and complete all around. A very fine White […]

Detailed Description This pseudomorph of goethite after marcasite has a cool habit we see in a few specimens, where there is an underlying overall pseudo-octahedral shape. This specimen is so dark brown that it is essentially black, and the crystals are highly lustrous, polished by the blowing sands of the White Desert. The crystals show […]

Detailed Description This pseudomorph of goethite after marcasite features interpenetrating fiveling twins. The crystals are deep brown, and lustrous, polished by the blowing sands of the White Desert. The crystals show some rounding from the natural sand polishing. In excellent condition and complete all around. Great specimen of a fiveling twin. Please Note: the colour […]

Detailed Description A great pseudomorph of goethite after marcasite, this is a lustrous ball of crystals. The crystals are deep brown, almost black, and polished by the blowing sands of the White Desert. In excellent condition with a couple of chips, and the ball is complete all around. Of the many habits of these White […]

Detailed Description A great pseudomorph of goethite after marcasite, this is a ball of interpenetrating bladed crystals. The crystals are lustrous and a deep brown, almost black. In excellent condition, and the ball is complete all around. A very fine White Desert crystal ball! Please Note: the colour representation in the still photograph has been […]

Detailed Description A highly lustrous pseudomorph of goethite after marcasite. The crystals are still clearly defined, but they have been polished by the blowing sands of the White Desert, and they are glossy, deep chocolate brown. The cluster is complete all around and looks great. In excellent condition, and a great distinctive shape. Please Note: […]

Detailed Description A highly lustrous pseudomorph of goethite after marcasite. The crystals are still well-defined, but they have been polished by the blowing sands of the White Desert, and so they are glossy! The cluster is complete all around and in fact it’s hard to decide which way it displays best. In excellent condition, this […]

Detailed Description This is a very unusual goethite pseudomorph from the White Desert. Most of these specimens are pseudomorphs after marcasite, and some have had quite a star-like appearance, with pointed spires radiating out from a centre. This one, however, is very different – many of these were pyrite crystals before they were goethite. There […]

Detailed Description A great pseudomorph of goethite after marcasite, this is a ball of bladed crystals all around. The crystals are lustrous and a deep brown, polished by the sands of the White Desert – looks almost like it’s made of chocolate, ever-so-slightly melted. In excellent condition, one small chip (oriented at the bottom, not […]