| | Journal (issue) | Sapphire from the Tan Huong–Truc Lau Area, Yen Bai Province, Northern Vietnam Nguyen Ngoc Khoi, Chakkaphan...Nhung Although not as well known as the Luc Yen district, this area is an important source of ruby and...and zircon from Ethiopia • Sapphire mining in Sri Lanka • Green cat’s-eye spodumene from Brazil • Color-zoned...characteristics of r uby and sapphire from Yen Ba i Province, in nor thern V ietnam. There is an ar ticle by...SAPPHIRE FROM THE TAN HUONG–TRUC LAU AREA, YEN BAI PROVINCE, NORTHERN VIETNAM Nguyen Ngoc Khoi, Chakkaphan | | | Book | Cryptocrystalline, banded, various Alexandrite Chrysoberyl Almandine Garnet Commonest purphsh-red variety Amazon...spinel, chrysoberyl, moonstone, tourmaline, topaz, almandine, pyrope, hessonite and spessartite garnets, as...Gems’. 1 The official name for Ceylon is now Sri Lanka, but the older and more familiar title is retained...disused, cover a far wider area than this. The district is heavily forested and notoriously imhealthy...shall describe. This, the Orapa mine, is in the province of Botswana and in desert country 176 miles from |
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