GIA's Gübelin Gem Project: Various Gems, Danburite – Humite


Danburite
Photo by Robert Weldon/GIA, courtesy Dr. E. J. Gübelin Collection
GIA Collection 35375

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities. Documents, like the ones below, present information on gemstones that range from occasional use in jewelry to those that are quite rare and seldom faceted because of the lack of suitable starting material.

 
 
34391
15.81 ct Danburite from Madagascar

15.81 ct Danburite 
Madagascar (PDF)
                                      
 
34390


30.37 ct Danburite
Madagascar (PDF)

 
34451


6.78 ct Danburite
Mexico (PDF)

 
34557


25.30 ct Danburite
Myanmar (PDF)

 
35375
6.51 ct Danburite from Russia

6.51 ct Danburite
Russia (PDF)

 
34810


6.37 ct Danburite
Sri Lanka (PDF)

 
34808


11.12 ct Danburite
Sri Lanka (PDF)

 
35177


5.66 ct Danburite
The United States (PDF)

 
35178
12.12 ct Datolite from United States

12.12 ct Datolite
The United States (PDF)

 
33818


0.47 ct Diamond
Locality not stated (PDF)

 
35378
13.18 ct Diaspore from Turkey

13.18 ct Diaspore
Turkey (PDF)

 
34699


4.30 ct Dioptase
Namibia (PDF)

 
35391
7.88 ct Dolomite

7.88 ct Dolomite
Locality not stated (PDF)

 
35183


14.36 ct Dolomite
The United States (PDF)

 
34362


2.85 ct Epidote
Kenya (PDF)

 
34704


4.21 ct Epidote
Namibia (PDF)

 
34004
9.72 ct Epidote

9.72 ct Epidote
Locality not stated (PDF)

 
34830


9.02 ct Epidote
Sri Lanka (PDF)

 
35187
2.97 ct Clinozoisite from United States

2.97 ct Epidote
The United States (PDF)

 
34010
7.17 ct Euclase from Brazil

7.17 ct Euclase
Brazil (PDF)

 
34279
7.79 ct Euclase from Brazil

7.79 ct Euclase
Brazil (PDF)

 
34834


8.06 ct Euclase
Sri Lanka (PDF)

 
35398
1.81 ct Euclase from Zimbabwe

1.81 ct Euclase
Zimbabwe (PDF)

 
35285


2.87 ct Euclase
Zimbabwe (PDF)

 
35575
1.52 ct Eudialyte from Canada

1.52 ct Eudialyte
Canada (PDF)

 
33116


6.30 ct Feldspar (Albite)
Kenya (PDF)

 
34347


10.48 ct Feldspar (Albite)
Kenya (PDF)

 
35625


6.00 ct Feldspar (Andesine)
China (PDF)

 
34469


7.81 ct Feldspar (Bytownite)
Mexico (PDF)

 
33096


30.82 ct Feldspar (Labradorite)
Finland (PDF)

 
33138
2.60 ct Feldspar – Labradorite from United States

2.60 ct Feldspar (Labradorite)
The United States (PDF)

 
35197


7.71 ct Feldspar (Labradorite)
The United States (PDF)

 
33097
22.01 ct Feldspar – Labradorite from United States

22.01 ct Feldspar (Labradorite)
The United States (PDF)

 
33121
7.81 ct Oligoclase from Canad

7.81 ct Feldspar (Oligoclase)
Canada (PDF)

 
33124
11.35 ct Feldspar – Oligoclase from India

11.35 ct Feldspar (Oligoclase)
India (PDF)

 
33122
12.72 ct Oligoclase – Sunstone from Tanzania

12.72 ct Feldspar(Oligoclase) - Sunstone
Tanzania (PDF)

 
33098
25.33 ct Orthoclase from Madagascar

25.33 ct Feldspar (Orthoclase)
Madagascar (PDF)

 
34392
58.57 ct Orthoclase from Madagascar 150x113

58.57 ct Feldspar (Orthoclase)
Madagascar (PDF)

 
34569
15.21 ct Feldspar – Oligoclase from Myanmar

15.21 ct Feldspar (Orthoclase)
Myanmar (PDF)

 
35482


14.79 ct Feldspar (Orthoclase)
Locality not stated (PDF)

 
34839


4.37 ct Feldspar (Orthoclase)
Sri Lanka (PDF)

 
34837


14.64 ct Feldspar (Orthoclase)
Sri Lanka (PDF)

 
35200


27.58 ct Feldspar (Orthoclase)
Tthe United States (PDF)

 
34314


8.57 ct Feldspar (Orthoclase) - Moonstone
India (PDF)

 
34856


21.22 ct Feldspar (Orthoclase) - Moonstone
Sri Lanka (PDF)

 
33094
28.96 ct Sanidine from Germany

28.96 ct Feldspar (Sanidine)
Germany (PDF)

 
33150
42.95 ct Fluorite from Afghanistan

42.95 ct Fluorite
Afghanistan (PDF)

 
34410


12.84 ct Fluorite
Madagascar (PDF)

 
34388
51.10 ct Fluorite from Madagascar

51.10 ct Fluorite
Madagascar (PDF)

 
34020


2.87 ct Fluorite
Namibia (PDF)

 
33143
48.80 ct Fluorite from Namibia

48.80 ct Fluorite
Namibia (PDF)

 
34871


29.94 ct Fluorite
Sri Lanka (PDF)

 
34971


6.43 ct Fluorite
Switzerland (PDF)

 
34989
57.77 ct Fluorite from Switzerland

57.77 ct Fluorite
Switzerland (PDF)

 
35153


23.74 ct Fluorite
The United States (PDF)

 
33149
47.62 ct Fluorite from United States

47.62 ct Fluorite
The United States (PDF)

 
34280
17.54 ct Gahnite from Brazil

17.54 ct Gahnite
Brazil (PDF)

 
34029


3.27 ct Hambergite
Madagascar (PDF)

 
35629


0.29 ct Grandidierite
Sri Lanka (PDF)

 
34028


3.43 ct Hambergite
Madagascar (PDF)

 
34032
3.58 ct Hambergite from Madagascar

3.58 ct Hambergite
Madagascar (PDF)

 
34412
5.36 ct Hambergite from Madagascar

5.36 ct Hambergite
Madagascar (PDF)

 
34736


5.17 ct Hambergite
Nepal (PDF)

 
35406
1.00 ct Hauyne from Germany 150x113

1.00 ct Haüyne
Germany (PDF)

 
35421


2.40 ct Herderite
Brazil (PDF)

 
34283
4.93 ct Herderite from Brazil

4.93 ct Herderite
Brazil (PDF)

 
34282
6.13 ct Herderite from Brazil 150x113

6.13 ct Herderite
 Brazil (PDF)

 
35408
7.12 ct Herderite from Brazil

7.12 ct Herderite
Brazil (PDF)

 
35365
17.16 ct Herderite from Brazil

17.16 ct Herderite
Brazil (PDF)

 
35435


2.14 ct Humite (Clinohumite)
Tajikistan (PDF)