 | | Report (issue) | | get even such common birth), later, minerals as quartz, hornblende, and feldspar determined, and it is...Pegmatites (including "pneumatolytic" veins and many quartz veins) A. Silicic (granitic pegmatites) B. Alkalic...PRIMARY MINERALS: Silica: Trisilicates, feldspars: quartz, pyroxenes: silicates, orthoclase, microcline...almandite; hydroxy-: HYDROTHERMAL METAMORPHS: quartz, chalcedony, opal; Orthosilicates, hydroxy-: Silica:...mesolite, scolecite; Carbonates: calcite; Silica: quartz, chalcedony; Elements: copper, silver. ORIGIN |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Alberene and Old Dominion quarries, Albemarle County. In these two soapstone quarries, tabular ilmenite crystals |  | | Journal (issue) | | Werner Lieber Heidelberg, West Germany Olaf Medenbach Bochum, Germany Eric Offermann Arlesheim, Switzerland.............251 Chalcanthite from the Helvetia District, Arizona by George Robinson ....................to moderately rolling, developed on middle and upper Ordovician car bonate rocks. This region is within...structure and stratigraphy. The ore deposits lie in the upper and middle Mascot dolomite member of the Knox group...thickness of up to 914 m and is composed of the upper Cambrian Copper Ridge dolomite and three Ordovician |  | | Book | | streams and rivers f o r epidote, unakite, blue quartz, agate, chalcedony, petrified wood and other gemstones...aquamarine. Excited collectors took home from old quarries in Pennsylvania and Maryland, pieces of apple...deposits have come to light in Alabama and Tennessee. Quartz gems have been discovered in Florida and Mississippi...by Flora Collins. 3 i palachians as well as quarries which are on a semiactive basis such as those...sapphires, garnets, amazonite, amethyst, smoky quartz, rose quartz, williamsite and other gems at fee sites |  | | Book | | . . . . . . . . . . . . . . . 196 13 Striped quartz-epidote rock in Iisalmi . . . . . . . . . 199.... . . . . . . . . . . . . . . . . . 296 Smoky quartz of the Laitila rapakivi granite . . . . 100 Chalcedony...though it is the most valuable colour variant of quartz. The value of diamonds, on the other hand, has...mineralogical composition of jasper is microcrystalline quartz coloured blood red by hematite. Geological surveys...Amethyst Diabaasia Diabase Ruusukvartsi Rose quartz Paleoproterotsooisia kiviä Paleoproterozoic rocks |
|
