TC86AD5: A novelty at Tucson 2016. Parallel aggregates of very sharp and well defined octahedral crystals, with sharp skeletal growths. According to our sources the site is not supplying new specimens for collectors so new finds are not expected. We analyzed these Golds and they are really special. They contains a 99.1% Gold and about a 0.5 % Rhodium, which is quite uncommon. We’ll send a copy of the analysis to the buyer.
If you want to know more about these Golds you can use this link
The specimen has been reviewed, photographed and published in the magazine ‘Mineral Up’ on page 40 of the 2016/02 edition.
Serra do Caldeirão claims, Pontes e Lacerda, Alto Guaporé District, Mato Grosso  Brazil (2015)

Specimen size: 2 × 1.9 × 0.9 cm = 0.79” × 0.75” × 0.35”

Main crystal size: 1.8 × 0.6 cm = 0.71” × 0.24”