 | | Journal (article/letter/editorial) | | Alabama 36849 cookrob@auburn.edu Liddicoatite, Fluor-liddicoatite, and Liddicoatitic Tourmalines ANJANABONOINA...knowledge was the identification and description of liddicoatite from Anjanabonoina, Madagascar, as the calcium...Appleman, and Nelen 1977). The relationship between liddicoatite and elbaite seemed clear, and liddicoatite’s...in mineralogy. In the original description of liddicoatite, one site in the crystal structure was considered...the name of the type material from liddicoatite to fluor-liddicoatite (Henry et al. 2011). To further complicate |  | | Journal (issue) | | portable instruments when purchasing gems. 28 Liddicoatite Tourmaline from Anjanabonoina, Madagascar Dona...leadership in the field, the tourmaline species liddicoatite was named after him in 1977. Much of this tourmaline...the name liddicoatite on a new gem tourmaline species in 1977. The article on liddicoatite in this issue...Institution; Dunn, 1977) named “the mineral liddicoatite [the calcic lithiumtourmaline end member], in...GEMS & GEMOLOGY SPRING 2002 11 Figure 12. Liddicoatite, the calcic lithium-tourmaline end member, was |  | | Report (issue) | | collection Cover: A 22 cm cross section of a liddicoatite crystal from Anjanabonoina, Madagascar. Photo... nearly doubling the group's size by naming liddicoatite, uvite and ferridravite. Uvite had been a hypothetical...olenite, buergerite, chromdravite, povondraite, liddicoatite, uvite, feruvite, rossmanite, foitite, magnesiofoitite...the desirable colored gem species elbaite and liddicoatite or large crystals of schorl, dravite and uvite...complete substitution at the X-site of the elbaite-liddicoatite series. T his series requires coupled substitution |  | | Journal (issue) | | Blue-to-green tourmaline from Nigeria. In recent years, the Ibadan region of western Nigeria has become an important...Larson (Pala International, Fallbrook, California), Nigeria recently produced some fine blue-to-green tourmaline...mine is located in the Ilorin area of western Nigeria, and production has been sporadic. Although production...however, no copper was detected in either crystal. Nigeria as a new source of copper-manganese-bearing tourmaline...reportedly were from a new deposit near Ilorin, Nigeria. We were informed by these suppliers that the tourmalines |  | | Book | | Colorado (USA), Mias, Urals (USSR), Kaffa granites (Nigeria)eApplication: glazing and optical glass; was extracted...measuring 2.5 cm (Australia), Huachuca Mts (USA), Abuja (Nigeria). 1. Ferrimolybdite - yellow aggregates and...(USSR), San Bernardino Co. - California (USA), (Nigeria - alluvial deposits), (za·1re), (Australia), (Japan)•...rare; rock-forming mineral; in the granites of Nigeria; some American states: New Hampshire, Oklahoma...(Norway}, Scotland (Great Britain), (Greenland), (Nigeria), (Kenya), (USA), (USSR), (Canada). 1. Hedenbergite | | | Book | | Colorado (USA), Mias, Urals (USSR), Kaffa granites (Nigeria) eApplication: glazing and optical glass; was extracted...measuring 2.5 cm (Australia), Huachuca Mts (USA), Abuja (Nigeria). 1. Ferrimolybdite — yellow aggregates and...(USSR), San Bernardino Co. — California (USA), (Nigeria — alluvial deposits), (Zaire), (Australia), (Japan)...rare; rock-forming mineral; in the granites of Nigeria; some American states: New Hampshire, Oklahoma...(Norway), Scotland (Great Britain), (Greenland), (Nigeria), (Kenya), (USA), (USSR), (Canada). 1. Hedenbergite |  | | Journal (issue) | | known to occur in various species (i.e. elbaite, liddicoatite, rossmanite, darrellhenryite and uvite)—this...Anjanabonoina, the well-known producer of colourful liddicoatite that is typically sliced perpendicular to the...section, on Pan-African pegmatites, covers Nigeria’s Abuja mine, which has produced intense red as well as |  | | Journal (issue) | | gahnite from Nigeria • Emerald update with Arthur Groom • New find of deep blue aquamarine in Nigeria • Near-round...stress. Perhaps best known for their intricate liddicoatite crystals, the Anjanabonoina pegmatites in Madagascar...ORGANIC MATERIALS Blue gahnite from Nigeria. In recent years, Nigeria has gained considerable attention...Webb, “The pegmatites of central Nigeria,” Geological Survey of Nigeria Bulletin, No. 17, 1946, pp. 1–61)...approximately 1.5 ct each, from Kaduna State, Nigeria. Photo by Robison McMurtry. variety of source |  | | Book (edition) | | Vivianite, I 00 mm, Huanzala, Bolivia, H Page 3: Liddicoatite, polished, 70 mm, Anjanabonoina, Madagaskar...tin-bearing ring granite bodies of the Jos Plateau, Nigeria, mainly at Timber Creek, near Jos, and also at...topaz crystals in Delimi R., Bauchi State, both Nigeria. Blue aquamarine is common in alluvial gemstone...unique are emeralds from Gwantu, Kaduna State, Nigeria, which originated hydrothermally with aquamarine...volcano-intrusive ring complexes of the Jos Plateau, Nigeria, where a fine-grained cassiterite was mined from |  | | Journal (issue) | | from oxy-tourmaline species. C. can separate liddicoatite from dravite. D. reliably measures lithium (Li)...Along with sapphire, deep blue aquamarine from Nigeria (figure 7) was particularly popular, and many vendors...Figure 7. Deep blue aquamarine from Nasarawa, Nigeria (left to right: 1.94, 2.84, and 1.84 ct). Photo...Mrs. Egwuatu, a GIA Graduate Gemologist from Abuja, Nigeria, started the company with the aim of promoting...improves the conditions of its miners and suppliers. Nigeria is known for tourmalines that possess a wide range |
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