GIA's Gübelin Gem Project: Various Gems, Barite - Cuprite

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.

 

35345 7.25 ct Barite France (PDF)	34335 13.59 ct Barite Kenya (PDF)	34691 11.91 ct Barite Namibia (PDF)
35344 6.99 ct Barite The United Kingdom (PDF)	35167 7.55 ct Barite The United States (PDF)	35337 2.60 ct Bastnäsite Pakistan (PDF)
33928 3.36 ct Benitoite The United States (PDF)	35170 3.48 ct Benitoite The United States (PDF)	33927 3.77 ct Benitoite The United States (PDF)
33936 5.68 ct Beryllonite The United States (PDF)	35350 7.82 ct Beryllonite The United States (PDF)	33939 8.12 ct Beryllonite The United States (PDF)
35173 13.80 ct Beryllonite The United States (PDF)	33942 11.91 ct Brazilianite Brazil (PDF)	33948 14.39 ct Brazilianite Brazil (PDF)
34271 17.33 ct Brazilianite Brazil (PDF)	35311 20.18 ct Brucite The United States (PDF)	35353 1.32 ct Burbankite Canada (PDF)
35308 33.52 ct Calcite The Czech Republic (PDF)	35416 18.59 ct Calcite Mexico (PDF)	35415 23.58 ct Calcite Mexico (PDF)
34439 27.90 ct Calcite Mexico (PDF)	35429 6.21 ct Calcite Spain (PDF)	35570 9.01 ct Cassiterite China (PDF)
34788 4.07 ct Cassiterite Sri Lanka (PDF)	35366 1.97 ct Catapleiite Canada (PDF)	35361 16.34 ct Celestite Madagascar (PDF)
35176 11.52 ct Celestite The United States (PDF)	35313 42.13 ct Cerussite Morocco (PDF)	35368 1.34 ct Childrenite Brazil (PDF)
33792 17.64 ct Chrysoberyl Brazil (PDF)	33799 6.28 ct Chrysoberyl Myanmar (PDF)	33800 5.13 ct Chrysoberyl Locality not stated (PDF)
34797 5.25 ct Chrysoberyl Sri Lanka (PDF)	34792 10.15 ct Chrysoberyl Sri Lanka (PDF)	34800 16.02 ct Chrysoberyl Sri Lanka (PDF)
34313 2.68 ct Chrysoberyl - Alexandrite Brazil (PDF)	33805 3.43 ct Chrysoberyl - Alexandrite Locality not stated (PDF)	33809 2.85 ct Chrysoberyl - Alexandrite Russia (PDF)
35557 7.97 ct Cinnabar China (PDF)	35514 19.87 ct Cinnabar China (PDF)	35521 20.52 ct Cinnabar China (PDF)
35433 1.52 ct Clinohumite Tajikistan (PDF)	35516 5.42 ct Cobaltian Calcite The Democratic Republic of Congo (PDF)	35428 7.93 ct Cobaltocalcite Spain (PDF)
34351 7.78 ct Colemanite Kenya (PDF)	34405 2.69 ct Cordierite - Iolite Madagascar (PDF)	34555 10.14 ct Cordierite - Iolite Myanmar (PDF)
34802 8.77 ct Cordierite - Iolite Sri Lanka (PDF)	35440 4.73 ct Crocoite Australia (PDF)	35441 5.40 ct Crocoite Australia (PDF)
34705 16.64 ct Cuprite Namibia (PDF)