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1 - Adamite (V (Min)
2 - Krupkaite (Min)
3 - Cervandoni (Min)
4 - Nadorite ( (Min)
5 - Dufrenoysi (Min)
6 - Eudidymite (Min)
7 - Epididymit (Min)
8 - Pyrargirit (Min)
9 - Brewsterit (Min)
10 - Tourmaline (Min)
11 - Prase quar (Min)
12 - Aschamalmi (Min)
13 - Spessartin (Min)
14 - Native Lea (Min)
15 - Fluorapati (Min)
16 - Andradite (Min)
17 - Sideronatr (Min)
18 - Columbite- (Min)
19 - Rosasite w (Min)
20 - Ktenasite (Min)
21 - Colemanite (Min)
22 - Senarmonti (Rol)
23 - Hematite, (Rol)
24 - Quartz (Rol)
25 - Quartz (Rol)
26 - Quartz (Rol)
27 - Cerussite (Rol)
28 - Vesuvianit (Rol)
29 - Beryl var. (Rol)
30 - Boracite (Rol)
31 - Gaidonnayi (Rol)
32 - Gibbsite (Rol)
33 - Pyrolusite (Rol)
34 - Ancylite-( (Rol)
35 - Cuspidine (Rol)
36 - Clinochlor (Rol)
37 - Lorenzenit (Min)
38 - Lollingite (Min)
39 - Zapatalite (Min)
40 - Niocalite (Min)

Dufrenoysite - Lengenbach Quarry, Fäld, Binn Valley, Wallis, Switzerland (Type Locality) (#:MINS9186)

Group of elongated gray-metallic crystals of Dufrenoysite up to 4 mm long on dolomite matrix.A classic.

Formula :
Pb₂As₂S₅
System: monoclinic Hardness:3 Rarity:rare
Strunz id:II/E.18-10 - SULFIDES
Name origin: Named by Augustin Alexis Damour in 1845 in honor of Ours Pierre Armand Petit Dufrenoy [September 5, 1792 Sevran, Seine-et-Oise, France - March 20, 1857 Paris, France], Professor of Mineralogy in the École des Mines, Paris. The mineral dufrénite is also named in his honor.