 | | Journal (article/letter/editorial) | | held in Poland. Back in 2011, the first Mindat conference took place in Lwówek Śląski, Poland, where more...were introduced to the minerals and culture of Poland (Petrov 2011). This time the conference celebrated...birthday of Lwówek Śląski. Lwówek Śląski is located in Lower Silesia and has a population of about nine thousand...Hunting Adventure. Figure 2. Map of southwest Poland at its border with Germany and the Czech Republic...from the United States, Canada, United Kingdom, Poland, Germany, Spain, and Hong Kong. Leslie Gordon photo |  | | Book | | Chalcedony 54 Wulfenite Agate 55 Moss agate 56 Chrysoprase Cornelian Jasper 57 58 60 Petrified coral...yielded enormous crystals weighing many tons. At lower temperatures than that at which pegmatites are formed...on the fact that a mineral sinks in a liquid of lower specific gravity than itself, floats in one of higher... Lustre Metallic. Common form Coarse to fine wiry; platy or scaly; dendritic; massive; rarely in...alloyed. Shining golden-yellow. Opaque. Metallic. Wiry; platy or scaly; dendritic; small grains or nodules |  | | Journal (article/letter/editorial) | | can consider that weathering processes occur at lower temperature than hydrothermal processes. Biological...431 is an opal-CT from Virgin Valley, Humboldt County, Nevada, USA. Several authors have proposed a hydrothermal...we shifted the position toward both higher and lower wavenumbers avoiding the neighboring absorption...structure: three chalcedonies (including one “chrysoprase”, i.e. green chalcedony), 11 opal-A and 24 opal-CT...Guadalupana, Nayarit, Mexico Hydrothermal Humboldt County, USA Hydrothermal Wegel Tena, Ethiopia Weathering |  | | Journal (article/letter/editorial) | | stones found in the hills, chalcedony, cornelian, chrysoprase, agate, and a curious white pebble containing...mountains are a fine race, dark skinned, Roman featured, wiry and hardy. They wear indigo-blue futah, turban,...quantities of cattle, sheep, goats, and a small wiry breed of camel (capable of carrying a 700-lb. load) |  | | Catalog/List | | grained mass in Calcite.(Dark Star Mine,Ravalli County, Montana USA) 1 x 14 £2.50 1x1 £4 1x2 £10 156 NATIVE...matrix (Union Carbide Mine, Wilson Springs Garland County, Arkansas USA) 1x1 £4 1x2 £7.50 360 PARATELLURITE...matrix. (Outpost Mine, San Domingo Wash Maricopa County Arizona) Ixliins £4 107 CHLORARGYRITE Ag Cl good...Kamchiat.ka,Russia) £15 447 NATIVE SILVER. Ag good wiry micro crystals in and on Dolerite. (Imiter Morocco)...metallic mass in ■ matrix. (Mohawk Mine,Keenaw County Michigan USA) 1x1 £3 095 CALCIOVOLBORTHITE Ca Cu |  | | Book | | be washed down through the rock to be deposited lower down as different minerals which become often valuable...obscurely, it is said to be translucent, like chrysoprase. M inerals that block off light con1pletely like...Great Down ZCk --~ CLAY GAULT FORA.fArtoN LOWER GREENSANO GROUP UNO/"1 0€:o (includes FOLKESiONE...in narure, even though ir grows in distincti ve wiry, dendritic (tree-like) masses with rhe appea rance...the form of wiry, branching masses DID Crystal system: Isometric Crystal habit . - Wiry, branching |  | | Journal (article/letter/editorial) | | Diamond, near Quebec, and at Fairfield, St. Lawrence county, New York State, and the altered Chalk of Donald's...often present in such formations as the Upper and Lower Greensands and other sandstones, whether purely...corals, &c. Green chalcedonies occur, snch as chrysoprase and plasma; the former is said to contain some...unfrequently replaced by orbicular sile» in the Lower Greensand and other deposits. t Dr. Bowerbank insists...and contrasting strongly with the deep red of the lower sandstones. It is thus seen in Ben Eayand the Torridon |  | | Book | | CRYSTAL-SHAPED The Giant’s Causeway near Portrush in County Antrim, Northern Ireland looks like a collection...to be profitable, large atWieliczka salt mine, Poland quantities of the mineral must occur in one area...carry elements downwards. These are redeposited in lower layers which are thus enriched. Enriched layers...cavity in lava. Chalcedony — such as carnelian, chrysoprase, and agate — and jasper are distinguished by...desirable orange-red colours. CHRYSOPRASE At its finest, chrysoprase is a vibrant green and the most |  | | Book | | Venezuela Coral West Indies Amber Diamond Poland Guyana Nephrite Peridot Thulite Quartz Norway...accounting for around 90 percent of world production Chrysoprase Nephrite Amber Ruby Coral Opal Chrysoberyl... 960 CE The crown is made in a workshop in the Lower Rhineland of Germany 1400 1424–1796 The crown and...Rough Settings Silver and copper melded together Wiry silver | Most silver in the ground is extracted...other uses in industry. However, very small or lower-grade stones can be polished into gemstones rather |  | | Book | | Venezuela Coral West Indies Amber Diamond Poland Guyana Nephrite Peridot Thulite Quartz Norway...for around 90 per cent of world production Chrysoprase Nephrite Amber Ruby Coral Opal Chrysoberyl... 960 CE The crown is made in a workshop in the Lower Rhineland of Germany 1400 1424–1796 The crown and...Rough Settings Silver and copper melded together Wiry silver | Most silver in the ground is extracted...other uses in industry. However, very small or lower-grade stones can be polished into gemstones rather |  | | | | gold. But pyrite is harder, more brittle and has a lower specific gravity than gold. this page. It is based... Other aggregates are filiform (thread-like) or wiry. Minerals which crumble easily are earthy or powdery...instead. Silver often occurs as scaly, branching or wiry forms. The pure metal belongs to the cubic crystal...contains some iron and often some copper, giving it a lower specific gravity of ~ 14—19. The hardness is 4—4%...Argentite sometimes occurs in massive, tree-like- or wiry forms. The specific gravity is 7-2—7-4 and the |  | | Book | | peculiar property of electrons is that the move from a lower to a higher energy orbital is not a progressive...the abundances in the Earth as a whole are the lower abundances of hydrogen, helium, carbon, oxygen and...with an atom with a low electronegativity (much lower than 2.4), the electrons available for bonding all...electronegativity above 2.4 and the other below. If both are lower, a completely different type of bond forms (discussed...atoms with electronegativities of about 2.4 or lower combine. In certain cases, differences in electronegativities |  | | Book | | hexahedral, tetrahedra l, dodecahedral crysta ls; wiry, arborescent, massive Crystal system: cubic 14...Cleavage; fracture: none Habit: crysta ls very rare; wiry or scaly Crystal system: cubic 15 NATIVE ELEMENTS... It is used in alloys to increase hardness and lower the melting point. Antimony compounds are toxic...(Czech Republic), New Brunswick (Canada), Kern County (California, USA), Sardinia (Italy) and Sarawak...'silver', alluding to its silver content, which is lower than the mineral pyrargyrite. Easily confused with | | | Book | | hexahedral, tetrahedra l, dodecahedral crysta ls; wiry, arborescent, massive Crystal system: cubic 14...Cleavage; fracture: none Habit: crysta ls very rare; wiry or scaly Crystal system: cubic 15 NATIVE ELEMENTS... It is used in alloys to increase hardness and lower the melting point. Antimony compounds are toxic...(Czech Republic), New Brunswick (Canada), Kern County (California, USA), Sardinia (Italy) and Sarawak...'silver', alluding to its silver content, which is lower than the mineral pyrargyrite. Easily confused with |  | | Book | | facet girdle facets on the crown; 5. then the lower girdle A facets and the culet on the pavilion...wearing birthstone jewelrystarted in 18th-century Poland and has since spread throughout the world. The...lapis lazuli, for example, is more porous and has a lower specific gravity. Gilson Turquoise Gilson Coral...nuggets or grains, although it may also be found in wiry, dendritic (treelike) aggregates. When recently...found), South Africa, Thailand, Peru, Mexico, China, Poland, Hungary, Czechoslovakia, Norway, England, and |  | | Book | | so great that the iron simply cannot melt. The lower mantle is 6702,900km/420-1,800 miles down. Here... Great Down W MCI 3M 100 GAULT- formation LOWER GREENSAND GROUP U/Vq (includes FOLKESTONE FORMAT/Oty...and is then heated by the rock to be deposited lower down as dioxide, while the magma brings silicon...oxide and red said to be translucent, like chrysoprase. ruby by chromium. Impurities can turn Minerals...anorthoclase); Foids are richer in alkaline minerals. Their lower silica content a hammer. (nepheline, leucite, | | | Book | | peculiar property of electrons is that the move from a lower to a higher energy orbital is not a progressive...formation, separating into a core consisting mainly of lower abundances of hydrogen, helium, carbon, oxygen and...with an atom with a low electronegativity (much lower than 2.4), the electrons available for bonding...bonding electrons are distributed If both are lower, a completely different type of bond forms (discussed...atoms with electronegativities of about 2.4 or lower combine. In certain cases, differences in electronegativities |  | | Book | | Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...is harder and the test may proceed to the next lower grade. Not much force on the scratching point is...aggregates or weathered minerals have usually a lower hardness than the single or unaltered crystals of...For instance, hematite (hardness 6) will have a lower hardness in the radiating or earthy form than in...some differences. Transparency may also become lower because of mechanical effects - small rifts often |  | | Book (edition) | | Chapter 14 Gem Chrysocolla... 131 Chapter 15 Chrysoprase ... 135 Chapter 16 Carnelian ... 139 • I Chapter...envy and was thought to attract divine favor. Chrysoprase protected the thief from hanging. So universal...degree that lower prices for rough were not passed on to the jeweler and consumer as lower prices for...market control would lead to greater competition and lower prices. That was my prediction in 2002. However...evaluating the brilliance of a gem. At this angle, the lower half of the gem's face is evaluated, then the stone | | | Book | | Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...is harder and the test may proceed to the next lower grade. Not much force on the scratching point is...aggregates or weathered minerals have usually a lower hardness than the single or unaltered crystals of...For instance, hematite (hardness 6) will have a lower hardness in the radiating or earthy form than in...some differences. Transparency may also become lower because of mechanical effects — small rifts often |  | | Book | | gold. But pyrite is harder, more brittle and has a lower specific gravity than gold. this page. It is based... Other aggregates are_fi/iform (thread-like) or wiry. Minerals which cru1nble easily are earthy or powdery...instead. Silver often occurs as scaly, branching or wiry forms. The pure metal belongs to the cubic crystal...contains some iron and often some copper, giving it a lower specific gravity of 14-19. The hardness is 4-4½...Argentite sometimes occurs in massive, tree- like or wiry forms. The specific gravity is 7·2-7 ·4 and the |  | | Book | | Reniform (or kidnev -shaped) Stalactitic (pendent) Wiry : Leafy : copper. copper. gold. internal structure...determines whether the substance has a higher or a lower refractive index than the liquid in which it is...composition of the external layers of the earth. of the Lower zones must have a different composition for there...Transparent to trans- Double Refractive index, 1*536. lower than that of slightly quartz. Brachypinacoidal...distorted. More usually it occurs in branched or wiry aggregates, in leaf-like expansions, or in a finely |  | | Report (issue) | | structures. Actinolite is a major constituent of the lower Adelaidean metamorphic marbles, calcsilicates, volcanics...copper mine with cuprite. Olary Province—filiform wiry copper occurs in jasper and in massive cuprite at...kimberlite diatremes and dykes were located in county Kimberley in 1969. Three diamonds were recovered...Barossa gold mine. North West Province—with chrysoprase, moss agate, and jasper in the ochreous nickeliferous...trig. Flinders Ranges—huntite lines cavities in lower Cambrian dolomites near Reaphook Hill. Mount Lofty |  | | Book | | splitting of light, resulting in its “fire.” The lower refractive index of opal indicates a stone that...layers, it is reflected from both their upper and lower surfaces. As the rays travel different distances...today quartz matrix as it is a jewelry metal. Wiry silver In this specimen, crystalline wires of native...valuable citrine (p.101). Spain, the Netherlands, and Poland, the black variety of smoky quartz is known ; ...distinguished from cat's eye chrysobery| by its lower specific gravity. — When cat's eye quartz is cut |  | | Book | | increasing hardness so that each will scratch those lower in the scale. 1 Talc (softest) 2 Gypsum 3 Calcite...octahedral or dode cahedral. usually massive. scaly c wiry aggregates. Twinning is cornrno on octahedral planes...mineral of similar a Ippearance. by its black streak. lower So.G. and colour. Arg~ntite (Silver glance) Ag...also occurring as massive arborescent or filiform (wiry) aggregates. Colour Black: opaque. Metallic lustre...Soluble in nitric acid. Distinguished from pyrite by lower hardness:gold by brittle character and pyrrhotine |
|
