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1 - Lorenzenit (Min)
2 - Lollingite (Min)
3 - Zapatalite (Min)
4 - Niocalite (Min)
5 - Pargasite (Min)
6 - Cylindrite (Min)
7 - Apjohnite (Min)
8 - Sulphur (Min)
9 - Ludwigite (Min)
10 - Cavansite (GMi)
11 - Sincosite (GMi)
12 - Plagionite (GMi)
13 - Pararealga (GMi)
14 - Murdochite (GMi)
15 - Graeserite (GMi)
16 - Durangite (GMi)
17 - Dawsonite (GMi)
18 - Cornetite (GMi)
19 - Chabazite (GMi)
20 - Alluaudite (GMi)
21 - Alabandite (GMi)
22 - Isoferropl (Min)
23 - Carlfriesi (Min)
24 - Ephesite (Min)
25 - Fluoro-Lea (Min)
26 - Pyrosmalit (Min)
27 - Barysilite (Min)
28 - Rhabdophan (Min)
29 - Bromargyri (Min)
30 - Lengenbach (Min)
31 - Gold (Min)
32 - Buttgenbac (Min)
33 - Gold (Min)
34 - Rouaite (Min)
35 - Goldhillit (Min)
36 - Phosphophy (Min)
37 - Guimarãesi (Min)
38 - Faujasite- (Min)
39 - Kongsbergi (GMi)
40 - Pyrite (GMi)

Probertite - Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz, Thuringia, Germany (#:MINS9037)

Cluster of clear xls of Probertite in parallel growth , up to 5,5 cm long.

Formula :
NaCa[B₅O_7_(OH)₄] * 3 H₂O
System: monoclinic Hardness:3½ Rarity:rare
Strunz id:V/J.5-30 - NITRATES, CARBONATES and BORATES
Name origin: After Frank H. Probert, Dean of the Mining College, University of California.