A surprising quantity of the rare mineral penfieldite
as small, sharp, pyramidal crystals lining vugs in galena and associat ed with powdery boleite was found in 2001 at the Margarita mine in Sierra Gorda.
From Sierra Gordo, Chile, he had new specimens of blue penfieldite
. Francois Leitard (email@example.com) had several new items including twinned calcites up to 3.5 cm from Rio Grande do Sul.
His second new item is penfieldite
(a lead oxychloride) from Sierra Gorda, Chile.