 | | Journal (issue) | | completely filled with precious opal, common opal, and hyalite, which have been formed by the infiltration of...political boundaries, are located in Slovaki,., a province of the new Czechoslovakian Republic. Several gem...not only cut encabocbon, bur is also facetted . Hyalite is found at San L uis Potosi. At prese:-it mo:;t...of bamboo. Such irregular lumps are usually of hyalite or hydrophane opal, more or less transparent, and...grouped in o rde r of the varieties of opal, namely, hyalite, precious opal, hydrophane, fire• opal, milk-opal |  | | Catalog/List | | this very rare feldspar on a fme grained greyish gabbro Kurumazawa, katashina Gumma prefecture Japan 5...thick Cassagna Mine, Ne ,Graveglia Valley, Liguria Italy, I collected it in 2019. £18 14 BRUCITE a good small...mauve chip about 8mm Wessels mine, North Cape Province South Africa £8 31 CLINTONITE two or three small...obvious brown masses in 3xl cm Faiallo pass, Genoa Italy £8 46 BARYTES, the classic oakstone. A cut and...lx2 surface Molinello Mine, Val Graveglia Liguria Italy £8 1 67 CORDIERITE pale blue and ILMENITE dark grey |  | | Journal (article/letter/editorial) | | or with hyalite, but there is always a clear kernel. C. A. B. Occurrence of Prehnite i n Tuscany. By A...161).-This mineral occurs-;-1. At Impruneta, in gabbro, of which it is a “ decomposition-product.” The...Moiztecatini, in the Cecina valley, in hollow spaces in gabbro ; prismatic crystals are found exhibiting the forms...(mineralogically speaking) correspond with diabsse and gabbro, and contain from 40 to 50 per cent. of silica |  | | Book (edition) | | sample of scheelite, coming from Traversella (Turin, Italy), in light natural (above) and exposed Other...small deposits are found near Pisa and Florence (Italy). Uses Native copper rarely occurs in large enough...Formerly mined in a small district near Monte Rosa (Italy). The main source of the commercial metal, used...Found in quartzite lenses near Serravezza (Lucca, Italy) in deposits of commercial importance. Uses In amalgams...the Harz (Germany), Erzgebirge (DDR), France, Italy, Romania and Czechoslovakia. In Camp, Santa Cruz |  | | Catalog/List | | "Onyx Marble;" California Travertine, cavernous; Italy . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . Alabaster, translucent masses; Italy . . . . . . . . . . . . . . . . . . . . . HALITE.... ... Xline nodule; Nova Scotia. 1 x l", l0t. HYALITE--See Opal HYDROl\tAGNESITE (hydrous basic magnesium...rounded, averaging l " ; Italy. Per oz., 20¢. XI, crude, broken, in lava; Italy . . . . . . . . . . . ...grain . . . . . . . . . . . . . . . . . . . . . Hyalite Clear crustations on rock ; N. Carolina . . . |  | | Report (volume) | | and consists of serpent.iE Lt:d (!1~, He cut br gabbro dikes which have been altered to rodingite. It...serpentinite indicates that calcium escaped from the gabbro during its metasomatism to rodingite. Strong narrow...penninite, coalingite "films", grossularite, prelmite, hyalite, and chalcedony. 1 2 SERPENTINITE AND RODINGITE...Heyl (1960, p. 724) 'as "Large; in :serpentinized gabbro." Griscom and Peterson (1961), in a short 39° 07'... f 80 EXPLANAT ION 1::: : : :::~:: :::: ::1 Gabbro Serpentinite Wissahickon Forma ~ v~ Area 'x |  | | Catalog/List | | SANIDINE SUNSTONE PARACELSIAN PERTHITE PLAGIOCLASE 3 GABBRO GADOLINITE GAHNITE GANOSPINEL GARNET ALMANDINE...HIDDENITE HODGKINSONITE HORN CORAL HOWLITE HURLBUTITE HYALITE HYDROPHANE HYPERSTHENE LABRADORITE SPECTROLITE...BOULDER OPAL CACHALONG DENDRITIC OPAL FIRE OPAL HYALITE HYDROPHANE MOSS OPAL OPALITE OPALIZED BONE OPALIZED...Greenish quartz Jade (Japanese) Black opal Moldavite Hyalite Axinite Lapis Lazuli Man- made aventurine glass...Moroxite Greenish-blue apatite Muller’s glass Hyalite Mussite Diopside Needle stone Rutilated quartz |  | | Catalog/List | | ins £3 La Cetine Mine. Near Rosia, Sienna, Tuscany. Italy Quirang, Skye, Scotland 'A x A £4 Ramsley...crystal inwhite Albite Alpe Rosso, Vai Vigezzo Italy about half ins size Ixl" £4 Near Elizabeth Lake...Cordoba with short wave due to possible U minerals Province, Argentina__________ Pure white masses Ivigtut...Greenish masses with some black Spinel Trentino, Italy white micro crystals in limonitic matrix 1x2 £1...Location interest________________ Molinello Mine, Italy Brown fibrous areas on quartz White fibrous filling |  | | Report (issue) | | WEATHERING PRODUCTS (in part Hydrometamorphs) opal (hyalite); Orthosilicates, hydroxy-: vermiculite, kaolinite...and southern New York. Highland Province the Low Blue Ridge Province maturely dissected mountains,...ridges, valleys. Appalachian Ridge and Valley Province crested Appalachian Plateau Plateau of moderate...The gneiss is locally very thoroughly injected by gabbro, and constitutes a composite formation. The gneissic...The formation is often thoroughly injected with gabbro. The Franklin limestone occurs intimately associated |  | | Journal (article/letter/editorial) | | dolerite (diabase), and finally into a uralitic quartz-gabbro, containing 57"5 per cent. of siliea,--a rock in...in these pages, however, what an important part hyalite and tridymite play in some of these rocks. The...these globules lead one to conclude that they are hyalite; but as this is a perfectly new mode of occurrence...9 3 , simulate the appearance of globules of hyalite. 1 In order to arrive at more definite conclusions...caustic potash on it is a well-marked character of hyalite. After long treatment with caustic potash, too |  | | Catalog/List | | in La Cetine Mine. Near Rosia, ½x½£4 Sienna, Tuscany, Italy slag. Quirang, Skye, Scotland CHABAZITE Sharp...crystal inwhite Albite Alpe ~osso, Val Vigezzo Italy CaAlSiO about half ins size ----~ u s Joc,itions...SiO with short wave due to possible U minerals Province, Argentina lxl £1.30 lx2 CRISTOBALITE Rich white...Greenish masses with some black Spinet Trentino, Italy FASSAITE Pyroxene Crystal Park,Colorado U.S.A lxl...Cu Zn As SbS County GANOPHYLLITE Molinello Mine, Italy lxl £3.60 lx2 £5 KNaMnAIMg SiO GARRONITE White fibrous |  | | Journal (article/letter/editorial) | | generally found as well-shaped crystals surrounded by hyalite areas with "brush" extinction, and an intermediate...Microlites are common in the inner of the two hyalite bands, but very scarce in the outer. The felspar...lower than that of quartz. The fibres are probably hyalite, and the variation in the optical properties is...in aggregates as the outer margin of a band of hyalite, which is usually found round the euhedral quartz...rock, a narrow layer of tridymite occurs in the hyalite, but very near the outer margin. The base of the |  | | | | Translation © Orbis Publishing Limited 1972 Printed in Italy by |GDA, Novara SBN O 85613 0001 For many years...hornblende 98 howlite 83 humite 80, 80 hyacinth 79 hyalite 33 hydrargillite 37 hydromagnesite 53 hydrotalcite...rocks rich in magnesium and poor in silica, such as gabbro and peridotite. It is normally found in granules...(Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén (Spain). In the United States...Filiform silver: Nicola Secci, Sarrabus, Sardinia (Italy) endritic copper rmation. Houghton fichigan) |  | | Book | | with Orbis Publishing Limited abcdefgh Printed in Italy by IGDA, Novara Adapted from the original Italian...euxenite 36, 36 howlite 83 humite 80, 80 hyacinth 79 hyalite 33 hydrargillite 37 hydromagnesite 53 hydrotalcite...found in igneous rocks rich in magnesium and gabbro granules and and poor in silica, such as peridotite...Idrija (Yugoslavia), some mines on Mount Amiata, Tuscany (Italy), and Almadén (Spain). In the United States...Filiform silver. Nicola Secci, Sarrabus, Sardinia (Italy) Dendritic copper famous (Michigan) 1822. It |  | | Journal (article/letter/editorial) | | shaft was begun two years ago. The basic rock is gabbro. From the minerals found here the tunnel evidentally...some brown granular calcite found by itself on gabbro was found to fluoresce a weak yellow. Some very... prismatic gray zoisite crystals were found in gabbro (see illustration). ïifjtfiiïfêiiâêiiBÊÊa Ttvf/i...autungroups of 15 in the morning and afternoon ite, hyalite, and others represented. Mr. Greene to Mr. Greene's |  | | Journal (article/letter/editorial) | | North Ivy Street to the right is green fluorescing hyalite in thin ROCKS AND MINERALS coatings on granite...six feet in diameter which is well coated with hyalite and makes quite a display at night under the Mineralight...the corner of the above streets to look for the hyalite. "At the East Haven location it is getting harder...basalt. DELAWARE — Small black biotite plates in gabbro have been found at the old Hubbard quarry ¡n Wilmington...miles north of Dublin, is also being reopened. ITALY—About 105 miles south of Sicily (Italy's largest |  | | Book | | is an example of a poly- tites. been found in Italy (Sicily and Romagna), Diamond is found in South...Australia, Morocco, Zambia, the Balkan countries, Italy, etc. converted into beta-sulfur (monoclinic for...France. fi? A Sulfur (ca. x 1), Belisio, Pesaro, Italy. Octahedral diamond crystal > : (ca. x 0.5) Kimberley...sublimation craters. Germany, Hungary, Japan, and Italy. of sea water. Deep deposits, due to their ASSOCIATED...Violet rock salt (ca. x 1), Calascibetta, Enna, Italy. TRANSPARENT MINERALS 37 FLUORITE FLUORITE |  | | Catalog/List | | innesota ................... ............... Xline, in gabbro ; Minnesota ......................... .60 .60...Ma rble ;" California Travertine , cavernous ; Italy........... ........... .2 5 .60 C AN C RINITE (complex.... . . . . . . . Alabaster, translucent masses; Italy. . . . . . . . . . . . . . . . .25 .60 .25 .25...aluminum metasilicate ) XI, crude, broken, in lava; Italy, small............... Leucite rock (Wyomingite);...odd formations; Yellowstone National Park . . Hyalite Clear crustations ; N. Carolina, %. " x %", 10 |  | | Book | | crystallized. 8 magmatic processes peridotite magma gabbro magma organogenous sediments diorite magma chemical...olivines, pyroxenes and amphiboles. Basic rocks (eg gabbro and basalt), comprising more SiO2 , Al 2O3 and...pyrite, marcasite, in various kinds of opals and in hyalite; aggregates} occur in veins, cavities or vugs...Sicily (Italy). Sulphur of volcanic origin is found in Turkey, Mexico, Indonesia, Japan, USSR, Italy and...(USA). Perfect crystals have come from Sicily (Italy), (Poland) and (the USA). Individual crystals have |  | | Journal (article/letter/editorial) | | is often considerably altered ; in a few of the gabbro fragments wedges of micropegmatite are seen between...crystals and filled in with calcite. The quartz-gabbro fragments differ from the rocks of similar mineral...rocks of pre-Karroo age in the north of the Cape Province. The red breccias of the eastern and south-western...Orthoclase fragments are present as well as pieces of gabbro and minerals derived from Figures in bnicketa refer...and enclosing fragments of sedimentary rocks nnd gabbro, etc. The obviotis character common to a11 these |  | | Catalog/List | | ON MUSCOVITE (5cm x 5cm x 2cm) Pingua, Sichuan Province, China Highly lustrous black crystals of cassiterite...totally covering a thin quartz matrix. £58 9 1. HYALITE (8cm x 4cm x 3cm) Square Top Mountain, Queens/a11d...,Justralia Clear glassy botryoidal growths of hyalite to 4cm on a vesicular basalt matrix. ( Bright green...natrolite pseudomorphs to .imm totally covering a gabbro matrix with four hollow stilbite after calcite |  | | Journal (article/letter/editorial) | | 15, pls. 3, fig. I. Rocks of a petrographic province, or from a rock-mass showing zonal or other differentiation...bronzite-orthoclase-gabbro, granite-porphyry, quartz-hypersthenediorite, essexite, essexite-gabbro, quartz-essexite-diabase...various amorphous silicates, such as quartzglass, hyalite, precious opal, moldavite, obsidian, and marekanite |  | | Book (edition) | | The plutonic rocks -granite, syenite, diorite and gabbro- occur usually in this form. Laccolite .- A dome-...aggregates . Hydrated silica : SiO2 + Aq. Opal, Hyalite. This mineral occurs in amorphous masses resulting...andesites). It is also deposited from the water of hot Hyalite, a pure springs and geysers (geyserite). colourless...rocks, especially of the more basic varieties : gabbro, dolerite, diabase, basalt, andesite, etc. b....augite, usually of a greenish colour, occurring in gabbro. The lami nation is parallel to the orthopinacoid |  | | Journal (article/letter/editorial) | | (altered)chromite(Golding suritizedaugitegabbro,hornblende gabbro,epidiorite and basicvolcanics.A few enclosures...merge into opentexturedchromitJte clay minerals,hyalite,sulphides, awaruiteand native (disseminated ore)...chromitesegregations and feldspathic. components of peridotite-gabbro complexesoccurin easternOregon (Thayer, 1946),...deposits of the Camagfiey district, Camagiiey Province, Cuba: U.S. Geol. Survey Bull. 954-B, p. 39-63...structureof the Moa chromite district, Oriente Province, Cuba: Am. Geophys.Union Trans., v. 28, p. 218-246 |  | | Journal (article/letter/editorial) | | third of the state is known as the Montana alkali province where the sediments have MICHAEL J. GOBLA 19055...Neihart, a contact zone formed by intrusion of gabbro into limestone: augite (2-cm crystals), calcite...petrified wood logs to 75 feet long) (Prchal 1969). Hyalite Peak, sec. 12, 16, 22, and 23, T. 5 S., R. 6 E...Peak, Heather Lake, and Hyalite Ridge, arduous 7-mi. hike: opal (variety hyalite, botryoidal) (Toland 1973)...Blackmore, sec. 32, T. 4 S., R. 6 E.: opal (variety hyalite, botryoidal) (Toland 1973). Red Cliff campground |
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