Search by filters (2 products)



Country of origin

Departement (France)


Au Bon Filon - Guillaume Mazankiewicz



Hello everyone, my name is Guillaume Mazankiewicz!

Passionate about mineralogy for 30 years and a geologist by training, I am originally from the Auvergne region in France; it is quite naturally there thatI started my prospecting and finds.

I specialized from the beginning in French mineralogy with a strong taste for fluorite! I criss-crossed the hexagon to discover the main French deposits and other more confidential ones; prospecting, photography of deposits and mineralization in place, discovery of crystals, this is my Ingres' violin...

In 2018 I created the aubonfilon website to make discover this aspect of mineralogy and to offer collectors a selection of French minerals from finds or purchases of collections.
I will regularly show you on this new site the latest acquisitions.

Payment by Paypal, cheque or bank transfer.
The sending is made by colissimo with tracking number. For metropolitan France, shipping costs are 5 euros and free from 100 euros of purchase.
The general conditions of sale are available on our website

Siret n°538 894 882 00033

Don't forget to precise which specimen you want to talk to with the seller (with a screenshot or the page link) :)