GIA's Gübelin Gem Project: Various Gems, Olivine - Rutile

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.

 

33884 18.72 ct Olivine (Forsterite) -  Peridot Egypt (PDF)	33885 19.46 ct Olivine (Forsterite) -  Peridot Egypt (PDF)	33879 28.99 ct Olivine (Forsterite) -  Peridot Myanmar (PDF)
35195 5.92 ct Olivine (Forsterite) -  Peridot The United States (PDF)	33367 6.05 ct Opal Mexico (PDF)	34464 6.59 ct Opal Mexico (PDF)
35459 5.38 ct Parisite Colombia (PDF)	35196 15.94 ct Periclase The United States (PDF)	35474 11.14 ct Petalite Brazil (PDF)
34291 16.48 ct Petalite Brazil (PDF)	35463 41.12 ct Petalite Brazil (PDF)	35461 17.60 ct Petalite Locality not stated (PDF)
35633 2.92 ct Pezzottaite Madagascar (PDF)	35636 4.15 ct Pezzottaite Madagascar (PDF)	34089 33.15 ct Phenakite Brazil (PDF)
34094 15.53 ct Phenakite Russia (PDF)	34861 5.81 ct Phenakite Sri Lanka (PDF)	35478 16.48 ct Phosgenite Morocco (PDF)
35466 25.56 ct Phosgenite Morocco (PDF)	35481 5.12 ct Phosphophyllite Bolivia (PDF)	35207 2.69 ct Pollucite The United States (PDF)
35623 31.53 ct Powellite India (PDF)	35486 8.56 ct Prehnite Australia (PDF)	35485 10.55 ct Prehnite Australia (PDF)
35468 13.61 ct Prehnite Locality not stated (PDF)	35467 15.18 ct Prehnite South Africa (PDF)	35208 11.10 ct Prehnite The United States (PDF)
35469 12.07 ct Proustite Chile (PDF)	35015 4.87 ct Pyroxene (Bronzite) Tanzania (PDF)	34414 4.52 ct Pyroxene (Diopside) Madagascar (PDF)
34560 8.34 ct Pyroxene (Diopside) Myanmar (PDF)	34565 14.19 ct Pyroxene (Diopside) Myanmar (PDF)	34847 13.55 ct Pyroxene (Diopside) Sri Lanka (PDF)
35381 3.70 ct Pyroxene (Diopside) The United States (PDF)	35385 0.91 ct Pyroxene (Diopside) -  Chrome Diopside Kenya (PDF)	34413 9.15 ct Pyroxene (Enstatite) Madagascar (PDF)
34561 1.50 ct Pyroxene (Enstatite) Myanmar	34846 2.90 ct Pyroxene (Enstatite) Sri Lanka (PDF)	34826 6.32 ct Pyroxene (Enstatite) Sri Lanka (PDF)
34819 9.98 ct Pyroxene (Enstatite) Sri Lanka (PDF)	34827 12.05 ct Pyroxene (Enstatite) Sri Lanka (PDF)	34820 16.31 ct Pyroxene (Enstatite) Sri Lanka (PDF)
35004 13.38 ct Pyroxene (Enstatite) Tanzania (PDF)	34034 6.47 ct Pyroxene (Hypersthene) India (PDF)	34644 9.72 ct Pyroxene (Jadeite) Myanmar (PDF)
35584 8.54 ct Pyroxmangite Brazil (PDF)	34442 30.23 ct Quartz Mexico (PDF)	33422 56.19 ct Quartz Locality not stated (PDF)
33388 23.76 ct Quartz - Amethyst Brazil (PDF)	35264 10.95 ct Quartz - Amethyst Zimbabwe (PDF)	35001 4.94 ct Quartz - Chalcedony (Chrysoprase) Tanzania (PDF)
33423 26.57 ct Quartz - Citrine Locality not stated (PDF)	35299 8.10 ct Quartz - Citrine Zimbabwe (PDF)	35257 11.11 ct Quartz - Citrine Zimbabwe (PDF)
33385 29.04 ct Quartz - Rose Quartz Locality not stated (PDF)	35019 5.21 ct Rhodochrosite South Africa (PDF)	34709 11.32 ct Rhodochrosite South Africa (PDF)
34679 17.77 ct Rhodochrosite South Africa (PDF)	35491 4.62 ct Rhodochrosite The United States (PDF)	35209 9.06 ct Rhodochrosite The United States (PDF)
35212 10.50 ct Rhodochrosite The United States (PDF)	35496 2.09 ct Rhodonite Australia (PDF)	34865 4.69 ct Rutile Sri Lanka (PDF)
34855 5.64 ct Rutile Sri Lanka (PDF)