Gems & Gemology Data Depository
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1 Gems & Gemology Data Depository Supplementary photos to accompany the article: Schwarz D., Pardieu V., Saul J.M., Schmetzer K., Laurs B.M., Giuliani G., Klemm L., Malsy A.-K, Erel E., Hauzenberger C., Du Toit G., Fallick A.E., Ohnenstetter D. (2008) Rubies and Sapphires from Winza, Central Tanzania. Gems & Gemology, Vol. 44, No. 4, pp Category: Photomicrographs Figure DD-1. Blue/pink color zoning. Photomicrograph V. Pardieu/GGL; magnified 10x, brightfield illumination.
2 Figure DD-2. Blue/pink color zoning. Photomicrograph V. Pardieu/GGL; magnified 10x, brightfield illumination.. Figure DD-3. Rarely seen are yellowish bands. Photomicrograph V. Pardieu/GGL; magnified 20x, brightfield illumination.
3 Figure DD-4. Blue/pink color zoning, partial twin lamellae, and included crystals. Photomicrograph V. Pardieu/GGL; magnified 10x, cross polars. Figure DD-5. Details of blue/pink color zoning and partial twin lamellae. Photomicrograph V. Pardieu/GGL; magnified 40x, cross polars.
4 Figure DD-6. Twinning. Photomicrograph V. Pardieu/GGL; magnified 40x, cross polars. Figure DD-7. Intersection tubes and blue/pink color zoning. Photomicrograph V. Pardieu/GGL; magnified 30x.
5 Figure DD-8. Color zoning. Photomicrograph V. Pardieu/GGL; magnified 40x, brightfield illumination. Figure DD-9. Color zoning consisting of delicate, slightly diffuse bluish violet bands. Photomicrograph V. Pardieu/GGL; magnified 40x.
6 Figure DD-10. Growth features in the form of straight lines/bands sometimes show a slightly blurred appearance. Also visible are some bluish violet color zones. Photomicrograph V. Pardieu/GGL; magnified 40x. Figure DD-11. Partially healed fissure composed of negative crystals. Photomicrograph V. Pardieu/GGL; magnified 30x.
7 Figure DD-12. Partially healed fissure composed of negative crystals. Photomicrograph V. Pardieu/GGL; magnified 20x. Figure DD-13. Partially healed fissure composed of negative crystals. Photomicrograph V. Pardieu/GGL; magnified 40x, brightfield illumination.
8 Figure DD-14. Partially healed fissure composed of negative crystals. Photomicrograph V. Pardieu/GGL; magnified 80x, brightfield illumination. Figure DD-15. Large hollow tubes associated with thin blue bands. Photomicrograph V. Pardieu/GGL; magnified 40x.
9 Figure DD-16. Long tube-, fiber-, needle-, or hair-like inclusions are straight, slightly curved, bent, or even (rarely) spiral-like. Photomicrograph V. Pardieu/GGL; magnified 40x. Figure DD-17. The curved needles are typically filled with an orange-brown (probably polycrystalline) solid material. Photomicrograph V. Pardieu/GGL; magnified 40x, fiber-optic illumination.
10 Figure DD-18. Long curved needle associated with an amphibole crystal. Photomicrograph V. Pardieu/GGL; magnified 40x. Figure DD-19. Well-developed amphibole inclusions. Photomicrograph V. Pardieu/GGL; magnified 40x, brightfield illumination.
11 Figure DD-20. Amphibole inclusion in a sapphire. Photomicrograph V. Pardieu/GGL; magnified 40x. Figure DD-21. A group of amphibole inclusions. Photomicrograph V. Pardieu/GGL; magnified 40x, brightfield illumination.
12 Figure DD-22. Elongate amphibole inclusion accompanied by needle-like formations that are oriented nearly parallel to one another. Photomicrograph V. Pardieu/GGL; magnified 40x, fiber-optic illumination. Figure DD-23. Group of yellow-orange, irregularly shaped garnet inclusions (dark areas are dirt). Photomicrograph V. Pardieu/GGL; magnified 40x, brightfield illumination.
13 Figure DD-24. Bluish gray, slightly milky domains in the form of clouds, bands, or growth sections are common. In general, a milky appearance is caused by the presence of very tiny grayish pinpoints. Photomicrograph V. Pardieu/GGL; magnified 20x, fiber-optic illumination. Figure DD-25. Irregularly shaped cavity containing a grayish white to pale yellow solid substance, which may be mistaken for flux material seen in synthetic gems. Photomicrograph V. Pardieu/GGL; magnified 40x.
14 Figure DD-26. Irregularly shaped cavity containing a grayish white to pale yellow solid substance, which may be mistaken for flux material seen in synthetic gems. Photomicrograph V. Pardieu/GGL; magnified 60x.
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