Franckeite is a relatively rare iron, lead, tin, antimony sulfosalt, which is not often found in well-crystallized display specimens, especially on matrix! This is one of the very few specimens of Franckeite that I have seen from the famous Siglo XX mine, and certainly one of the most eye-catching. The piece hosts several groups of Franckeite consisting of somewhat "sword"-shaped crystals forming spherical aggregates which are sitting on minor iridescent Sphalerite and/or Wurtzite with minor associated Pyrite and Quartz on matrix. A great quality specimen for somebody looking to own a rare and attractive "black" mineral. This is also a good opportunity to acquire something that is rarely offered in the open market, especially on such attractive matrix! This species belongs to the only group of minerals that forms in naturally "round" or "cylindrical" shaped crystals. This specimen was collected in August of 2010, and is excellent for the material. There were only a handful of good specimens, and well crystallized pieces ON MATRIX like this are few and far between from any locality. A wonderful rare species from one of the most classic mines in Bolivia!
Locality: Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia
Specimen Size: 7.0 x 4.2 x 3.3 cm (small cabinet)
Largest Crystal: 1.1 cm
Shipping from United States
1-3 business days
Estimated shipping times
- North America : 2 - 5 business days
- Europe : 7 - 14 business days
- Australia, New Zealand and Oceania : 10 - 20 business days
- Asia Pacific : 7 - 14 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
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Last updated 3 July 2022.
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