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1 - Marioantof (Min)
2 - Boleite (T (Min)
3 - Thortveiti (Min)
4 - Bakhchisar (Min)
5 - Loparite-( (Min)
6 - Falkmanite (Min)
7 - Dufrenoysi (Min)
8 - Ludlamite (Min)
9 - Covellite (Min)
10 - Bariopharm (Min)
11 - Tuperssuat (Min)
12 - Salammonia (Min)
13 - Sphalerite (Min)
14 - Sodalite w (Min)
15 - Fluorite (Min)
16 - Cummington (Min)
17 - Uvite (GMi)
18 - Descloizit (GMi)
19 - Jalite (GMi)
20 - Dolomite (GMi)
21 - Yuksporite (GMi)
22 - Sulphur (GMi)
23 - Stilbite (GMi)
24 - Vanadinite (Rol)
25 - Thorite va (Rol)
26 - Orpiment (Rol)
27 - Clinoclase (Rol)
28 - Klebelsber (Rol)
29 - Henmilite (Rol)
30 - Veszelyite (Rol)
31 - Roweite xx (Rol)
32 - Rockbridge (Rol)
33 - Aphophylli (Rol)
34 - Greifenste (Rol)
35 - Thomsonite (GMi)
36 - Thomsonite (GMi)
37 - Thomsonite (GMi)
38 - Thomsonite (GMi)
39 - Erythrite (Rol)
40 - Opal (Rol)

Thortveitite - Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy (#:MINS9297)

Blue Thorveitite xls of this very rare scandium mineral.

Formula :
(Sc,Y)₂[Si₂O_7_]
System: monoclinic Hardness:6-7 Rarity:very rare
Strunz id:VIII/C.1-10 - SILICATES
Name origin: Named in 1911 by Jakob Grubbe Cock Schetelig in honour of Gunder Olaus Olsen Thortveit (1 October 1872, Thortveit, Iveland, Aust-Agder, Norway - 15 June 1917, Rossås, Iveland, Aust-Agder, Norway), feldspar and mineral exporter from Iveland, Norway.