GIA 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)

 

GIA Gem Project

GIA has studied more than 400 important gemstones in the Edward J. Gübelin Gem Collection and is committed to sharing this repository of gemological information.

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Corundum

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Beryl

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Garnet

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Spinel

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Tourmaline

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Zircon

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