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

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  Madagascar	34390 30.37 ct Danburite Madagascar	34451 6.78 ct Danburite Mexico
34557 25.30 ct Danburite Myanmar	35375 6.51 ct Danburite Russia	34810 6.37 ct Danburite Sri Lanka
34808 11.12 ct Danburite Sri Lanka	35177 5.66 ct Danburite The United States	35178 12.12 ct Datolite The United States
33818 0.47 ct Diamond Locality not stated	35378 13.18 ct Diaspore Turkey	34699 4.30 ct Dioptase Namibia
35391 7.88 ct Dolomite Locality not stated	35183 14.36 ct Dolomite The United States	34362 2.85 ct Epidote Kenya
34704 4.21 ct Epidote Namibia	34004 9.72 ct Epidote Locality not stated	34830 9.02 ct Epidote Sri Lanka
35187 2.97 ct Epidote The United States	34010 7.17 ct Euclase Brazil	34279 7.79 ct Euclase Brazil
34834 8.06 ct Euclase Sri Lanka	35398 1.81 ct Euclase Zimbabwe	35285 2.87 ct Euclase Zimbabwe
35575 1.52 ct Eudialyte Canada	33116 6.30 ct Feldspar (Albite) Kenya	34347 10.48 ct Feldspar (Albite) Kenya
35625 6.00 ct Feldspar (Andesine) China	34469 7.81 ct Feldspar (Bytownite) Mexico	33096 30.82 ct Feldspar (Labradorite) Finland
33138 2.60 ct Feldspar (Labradorite) The United States	35197 7.71 ct Feldspar (Labradorite) The United States	33097 22.01 ct Feldspar (Labradorite) The United States
33121 7.81 ct Feldspar (Oligoclase) Canada	33124 11.35 ct Feldspar (Oligoclase) India	33122 12.72 ct Feldspar(Oligoclase) - Sunstone Tanzania
33098 25.33 ct Feldspar (Orthoclase) Madagascar	34392 58.57 ct Feldspar (Orthoclase) Madagascar	34569 15.21 ct Feldspar (Orthoclase) Myanmar
35482 14.79 ct Feldspar (Orthoclase) Locality not stated	34839 4.37 ct Feldspar (Orthoclase) Sri Lanka	34837 14.64 ct Feldspar (Orthoclase) Sri Lanka
35200 27.58 ct Feldspar (Orthoclase) Tthe United States	34314 8.57 ct Feldspar (Orthoclase) - Moonstone India	34856 21.22 ct Feldspar (Orthoclase) - Moonstone Sri Lanka
33094 28.96 ct Feldspar (Sanidine) Germany	33150 42.95 ct Fluorite Afghanistan	34410 12.84 ct Fluorite Madagascar
34388 51.10 ct Fluorite Madagascar	34020 2.87 ct Fluorite Namibia	33143 48.80 ct Fluorite Namibia
34871 29.94 ct Fluorite Sri Lanka	34971 6.43 ct Fluorite Switzerland	34989 57.77 ct Fluorite Switzerland
35153 23.74 ct Fluorite The United States	33149 47.62 ct Fluorite The United States	34280 17.54 ct Gahnite Brazil
34029 3.27 ct Hambergite Madagascar	35629 0.29 ct Grandidierite Sri Lanka	34028 3.43 ct Hambergite Madagascar
34032 3.58 ct Hambergite Madagascar	34412 5.36 ct Hambergite Madagascar	34736 5.17 ct Hambergite Nepal
35406 1.00 ct Haüyne Germany	35421 2.40 ct Herderite Brazil	34283 4.93 ct Herderite Brazil
34282 6.13 ct Herderite  Brazil	35408 7.12 ct Herderite Brazil	35365 17.16 ct Herderite Brazil
35435 2.14 ct Humite (Clinohumite) Tajikistan