 | | Journal (issue) |
| range of emeralds and green beryls from Central Nigeria. Detailed work on inclusions, compositions of hosts...deposits are exploited, e.g. in Australia, Thailand, Nigeria and China (Coenraads, 1992a; Guo et al., 1992)...on sapphire from other basaltic origins (e.g. Nigeria and Australia). She described as significant morphological...complex phosphate (Ca,Ce,Th)(P,Si)04' of the monazite group. The zircon inclusions (0.02 to O.lmm) are characterized...thorium-phosphate (Ca,Ce,Th)(P,Si)04' belonging to the monazite group (Figures 18 and 19). Stress fissures around this |
 | | Journal (article/letter/editorial) |
| Yemen lO(3) 185-191 alkali feldspar see ulso anorthoclase; antiperthite; K-feldspar; microcline; microperthite;...Ambittle Island geochemistry 12(3) 173-186 amphibole group see also alkalic amphi- bole; clinoamphibole; orthoamphibole...32(3-4) 273-298 Antong Java Rise see Ontong Java Plateau Aosta Valley Italy see Valle d’Aosta Italy apatite...geochemistry l7(3) 203-214 geochemistry 24(2) 83-95 Nigeria, geochemistry l7(2) 103- 115 Northern Territory...Scandinavia, geochemistry 13(2) 171-179 barium feldspar see hyalophane barometry, geologic see geologic |
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| Africa, it’s of Africans as well: as diverse a group as any you’ll find anywhere on the planet. The first...legacy often involving several minerals. Here, a group of Cerussite crystals have been overcoated by golden...limestone host rock are incorporated in parts of the group, but otherwise the amount of matrix is minimal....Mine about 1910. Gartrellite was described by a group of Aussies in 1989. This means that this specimen...There are “dings” to peripheral areas, but the main group is clean and free from damage. Measurements: 9.6 |
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| Syenite Rock . Microprobed material lxl £1 lx2 £2 Feldspar ½" £4 Ix! £6 lx2 £12 2x2 £25 35 ■ ALBITE Hoydalen...quite well covering Basalt. lxl £4 lx2 £8 2x2 £16 Feldspar Ix I £1.50 lx2 £3 Zeolite 16 ALBITE Lauvland,...CaFeP0/4 lxl £1.50 lx2 £3 2x2 £4.50 2x3 £6.50 Feldspar 963 ALBITE Maine USA 811 ANATASE Tysse, Hardanger...3mm crystal on quartz TiO lxl £3 Ix2 £5 2x2 £10 feldspar £5 ····- ~-------·-·-- ·· -·· 1077 ■■ ALLOPHANE...Quarry,Cornwall Black micro crystals in crystalline feldspar with minor fluorite. X 20 needed Greenish , good |
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| crystals in crystalline feldspar with minor fluorite. X 20 needed 1.5cm £4 no/2 feldspar 37 ANCYLITE Ce Dark...grained mass in calcite .CeSr CO/3 Ix½ £2.50 Ix! £4 Feldspar 20 ANCYLITE Ce Mt Yukspor, Kola Russia colourless...distributed in Porphyry. lx2 £1.50 2x2 £3 2x3 £5 3x4 £8 Feldspar 44 ANDRADITE Benallt Mine,Lleyn ,Wales Andradite... 1085 Ix! £1.50 lx2 £3 2x2 £6 2x3 £9 Dolomite group 822 ANNABERGITE LauruimGrcccc C:ibrerite variety...ANORTHOCLASE Ula, near Larvik, South Notway Feldspar group pure pale brown cleavages. lxl £1.20 lx2 £2 |
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| Quarry,Comwall Black micro crystals in crystalline feldspar with minor fluorite. X 20 needed Rich orange-red...orange-red masses with darker Hornblende lxl £1 lx2 £2 Feldspar 1.5cm £4 TiO/2 - -·- ·- ------- ··-- - -- -- -...Sr CO/3 Ix I £ 1.50 Ix2 £3 2x2 £4.50 2x3 £6.50 Feldspar - - -- ·- -37 ANCYLITE Ce Dark Star Mine.Ravalli...sheafy, masses Ce Sr CO/3 lxl £3 lx2 £5 2x2 £10 feldspar Ix½ £2.50 lxl £4 -ks-5 II■ .Ai BITE Hoydalcn,...2x2 £5 2x3 £8 Feldspar 168 ANORTHOCLASE Ula, near Larvik, South Norway Feldspar group pure pale brown |
 | | Book (edition) |
| to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...registered in this book (e.g. in the amphibole group). For more detailed information see "Dana's System...) 6-21 %. VHN(synth.) (10.C. purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite |
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| Synthesis of topaz 35 Crystal structure 36 The OH group and symmetry problems 4 Optical properties 44...Mozambique 183 Myanmar 183 Namibia 184 New Guinea 184 Nigeria 184 Northern Ireland 186 Norway 186 Pakistan 186...Brazil; Rhondonia state, Brazil, Sri Lanka; Jos plateau, Nigeria; Volyn district, Ukraine, and numerous pegmatites...Richards, 1956). Because Peri Lithon appears to be a group of notes rather than a formal text, and some parts...compositional group, the synthetic series, has no known natural counterparts. In this group, A1+3 and F- |
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| orange-red masses with darker Hornblende lxl £1 lx2 £2 Feldspar lxl £2 lx2 £3 BaS0/4 --- ---------------------------...semi-vitreous mass lxl £I.SO lx2 £3 2x2 £4.50 Feldspar Ix2 £4 2x2 £8 2x3 £ 12 3x4 £25 Be Al SiO · - -----...pale pink crystalline mass with some micros on Feldspar. lxl £3 lx2 £5 2x2 £12 Al Mn SiO ½" £4 lxl £8...Finland Feldspar group pure pale brown cleavages. Rich black masses in matrix 2x3 £9 Fclspar Group lxl £1...green . Quite rich in feldsp ar. Blueish masses in Feldspar lxl £5 lx2 £8 1x2_~ ---· ·- ·-· ··~,g ~8 ___ _ |
 | | Book (edition) |
| a. Geographic Coordinates peridot BA olivine group nesosilicates orthosilicates silicates BT minerals...(BT-NT) relationship is that of a group to an individual in the group, e.g., BT minerals to NT silicates...of the specific minerals in the olivine group, the olivine group is one of several mineral groups in the...reciprocals are: olivine group NA peridot nesosilicates orthosilicates NA olivine group NA nesosilicates silicates...Sandstone BT Upper Cretaceous Cretaceous SA Mesaverde Group New Mexico e. Reference to the Guide — Notes may |
 | | Book (edition) |
| commonly have several variants, such as Great Smoky Group, Great Smoky Conglomerate, Great Smoky Formation...If used on level 1, Term set options are: rock group (carbonate rocks, chemi¬ cally precipitated rocks...was adopted. Broader Term (BT, BX, BA, BZ) - A group of which the Term is a member or an area in which...Term (NT, NX, NA, NZ) - A specific mem¬ ber of a group which is represented by the Term or an area within...Term is a member. For example: peridot BA olivine group BA nesosilicates BA orthosilicates BA silicates |
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| INDIA’S FOSSILS GEM HUNTER Bernie Gaboury 3 FELDSPAR GEMS Sunstone Moonstone Labradorite GLOWING...July, August and September by Kenneth H. Rohn 3 Feldspar Gems ...........................................for all we know, there could be a whole different group of gemstones just waiting to be discovered. R&J:...SMITH, ARKANSAS: Wholesale and retail show; Exhibit Group International; Fort Smith Convention Center; 55... 3GEMS FELDSPAR Sunstone, Moonstone and Labradorite T Story by Bob Jones he feldspar group is quite |
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| Earth, Editorial and Design by T he Brown Reference Group pie ISBN O 7489 7935 2 NO i 07 04 18 Printed in...are often replaced by pyrite. FACT FILE PYRITE Group: Sulphides Crystal system: Cubic Habit: Cubes,...quartz rather brittle. FACT FILE ROSE QUARTZ Group: Oxides Crystal system: Trigonal Chemical formula:...CHARACTERISTICS Rose quartz is a member of the oxide group of minerals. It is an oxide of silicon, and it gets...beam of red light. Rubies belong to the corundum group of minerals, which also includes sapphires. They |
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| . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and.... . . . . . . . . . . . . . . . . . . . . . . Feldspar . . . . . . . . . . . . . . . . . . . . . . ....and mineralogy of feldspar . . . . . . . . . . . . . . . . 39.2. Magmatic feldspar deposits . . . . |
| | Journal (article/letter/editorial) |
| . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and.... . . . . . . . . . . . . . . . . . . . . . . Feldspar . . . . . . . . . . . . . . . . . . . . . . ....and mineralogy of feldspar . . . . . . . . . . . . . . . . 39.2. Magmatic feldspar deposits . . . . |
 | | Report (issue) |
| Survey has produced this volume to describe a select group of mineral commodities currently critical to our...antimony in China; niobium in Brazil; and platinum-group elements in South Africa and Russia), thus increasing...same commodities. Rare-earth elements and platinum-group elements particularly are broadly viewed as critical...lithium (Li), manganese (Mn), niobium (Nb), platinum-group elements (PGE), rare-earth elements (REE), rhenium...........................M1 Chapter N. Platinum-Group Elements By Michael L. Zientek, Patricia J. Loferski |
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| Orogenic plateaus 665 CONTENTS 29.4 The Colorado Plateau and the Great Basin 667 30.7 Accretionary prisms...manuscripts, proofs etc, were (almost) kept by a group of some twenty or so geologists, any or many of...far-off past; the ex¬ including the geological group, the rate of increase traordinary surprises, contradicting... Figure 2.4 Basaltic lava-flows of the Antrim plateau looking eastwards from the Giant's Causeway. Above...Allan Cash, Northern Ireland Tourist Board) (a) a group of light rocks, including granite and related types |
 | | Journal (issue) |
| metallic sulfides we call “pri mary min erals”. This group of brightyellow crystals is from the Cozzo Disi...SMITH, ARKANSAS: Wholesale and retail show; Exhibit Group International; Fort Smith Convention Center; 55...of sulfur, such as in medicine. Sulfonamides, a group of synthetic antibiotics, are just one example....sulfides clustered around lovely yellow sulfur crystal group, for without sulfur, the sulfides would never have...sand blasting, greasing and painting. The third group will stay up late at night researching the literature |
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| previously. Amazonite is a variety of potassium feldspar, a group of minerals extremely widespread in the Earth’s...The aforementioned characteristics of amazonitic feldspar allow it to be classified as highly promising...paragenesis, ontogeny, and the nature of amazonitic feldspar color, and the very concept of amazonite requires...the crystal chemical features of amazonitic K-feldspar. It is clear that the color of amazonite is affected...structural peculiarities of this variety of potassium feldspar. During the last few decades, geologists and mineralogists |
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| 2009 • 1:00 PM CT 5 41003 RUTILATED QUARTZ GROUP Novo Horizonte, Bahia, Northeast Region, Brazil...Madagascar Labradorite is a rare member of the feldspar group of minerals, crystallized from the molten magma...microscopic level; the alternating parallel layers of feldspar crystals selectively reflect only those light...Spruce Claim is this wonderful Quartz and Pyrite group. The Pyrite portion of the specimen is absolutely...Llanera, Villabona Mining Area, Asturias, Spain Group of cubic Fluorite crystals with intense honey color |
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| APOPHYLLITE Nomenclature revisions in the apophyllitc group: hydroxyapophyllite, apophyllite, fluorapophyllite...Uvite, a new (old) common member of the tounnalinc group and its implications for collections 8: I00-108... California (by T. Szenics) 21:127-132 AXINITE GROUP Magnesioaxinite from Luning, Nevada, and some nomenclature...nomenclature designations for the axinite group (by P. J. Dunn, P. B. Leavens & C. Barnes) 11:13-15 AZURITE...some nomenclature designations for the axinite group 11: 1315 BARNES, REGINALD The mines and minerals |
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| massive calcite. or, rarely, still attached to the feldspar/mica walls of the dike (www.davidkjoyceminerals...specimens in which euhedral crystals of andesine feldspar, augite and ilmenite rest on matrix of fine-grained...columnar crystals of hedenbergite. Around 1960. a group of collectors visited the mine. then temporarily... Orlandi and Vezzoni, 2013 ). A beautiful 8-cm group of ilvaite crystals spotted with tiny crystal!>...Alto Piano region of northernmost Argentina, a group of mines exploits playa lake deposits of borate |
