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Hutchinsonite with Barite
stock #22.1-384
Quiruvilca Mine, Santiago de Chuco Province
La Libertad Department, Peru
9x 7.2 x 3.5 CM (cabinet)
price: $390
Fall 22

This rare Thallium specie is almost unheard of in displayable cabinet sided specimens. This is a fine example from an old find at Quiruvilca, with crystals up to 3mm on a huge, (for the specie), Barite matrix. The Barite color and the matrix is a reddish violet, perhaps caused by Realgar and overall there is great luster. It is rare to find a displayable example of this substantial size, it is the largest we have ever seen. Thallium as a dominant element in minerals is not at all common, the crystals of Hutchinsonite are scattered as individuals and sprays most of which are in good condition when magnified but there are some broken zones which is typical of this very fragile mineral.

Bournonite - unusual non-twinned crystals
stock #AX-19-089
Quiruvilca Mine, Santiago de Chuco Province
La Libertad Department, Peru
6.8 x 3.7 x 2 CM (cabinet)
price: $450
new year 2021

Bournonite is so often twinned or in classic "cogs-wheel" form that untwinned crystals are quite rare. This Quiruvilca (Peru) specimen is that unusual sort, here are many Bournonite crystals, some over 1.2 cm but no twins. In fine condition overall most crystals are perfect but with good magnification some small areas of rough edges are found. For this notoriously fragile specie that is impressive. Some bright golden pyrite adds contrast to the dark silver-metallic Bournonite. For some reason the Pyrite at Quiruvilca Mine is often especially bright and lustrous, it seems to be more stable than most and keeps the bright golden color much better than any other Pyrite I know. A fine addition to a serious Sulfide collection.