alexandrite natural of photo stone

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421. Yellow chrysoberyl: Yellow greenish to light yellow or brown chrysoberyl, which contains ferric iron as an impurity. Has an absorption spectrum band at first part of the violet at 444 nm, which can be seen in some chrysoberyl cat's-eye.; HTML, 24 Kb, 2008-07-20 13:08:02; /chapters/glossary/yellow-chrysoberyl.html
422. X-ray crystal spectrometer: A device to obtain an X-ray spectrum for determining the wavelength of its chemical consistent. Each element, when irradiated by electrons, emits X-ray of several characteristic frequencies the line spectrum depending on the atomic number.; HTML, 24 Kb, 2008-07-20 13:07:50; /chapters/glossary/x-ray-crystal-spectrometer.html
423. Novello Mine and Girdlestone Farm at Alexandrite discussion forums | Alexandrite guide: Novello Mine and Girdlestone Farm at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2007-04-30 10:40:00; /discussion/post/-novello-mine-and-girdlestone-farm-FRM-163-00002
424. The Alexandrite Effect at Alexandrite discussion forums | Alexandrite guide: The Alexandrite Effect at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-27 12:22:00; /discussion/topic/the-alexandrite-effect-FRM-323
425. Specific gravity: The ratio of the weight of any substance to that of pure water at temperature of 3.98 C (39.2 F) degree and standard atmospheric pressure. Specific gravity of gems and minerals are determined by means by hydrostatic weighing method.; HTML, 24 Kb, 2008-07-20 13:06:51; /chapters/glossary/specific-gravity.html
426. X-ray: The produced wavelengths of X-rays according to the electromagnetic theory of light consisting of continuous band of wavelengths, which are a mixture of all wavelengths. Depends on the used voltage of apparatus, which is know as white X-ray radiation or g; HTML, 24 Kb, 2008-07-20 13:07:48; /chapters/glossary/x-ray.html
427. Alexandrite World Occurrences at Alexandrite discussion forums | Alexandrite guide: Alexandrite World Occurrences at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-04-01 09:32:34; /discussion/topic/alexandrite-world-occurrences-FRM-335
428. Alexandrite values at Alexandrite discussion forums | Alexandrite guide: Alexandrite values at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-09-05 08:33:15; /discussion/post/-alexandrite-values-FRM-166-00001
429. Platinum Alexandrite Engagement Ring at Alexandrite discussion forums | Alexandrite guide: Platinum Alexandrite Engagement Ring at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-22 02:30:17; /discussion/post/platinum-alexandrite-engagement-ring-FRM-176-00003
430. Hue: The characteristic color that is determined by its wavelength as red, green, blue, purple, yellow, etc., and excludes white, black, and shades of gray in reference to the visible spectrum of light.; HTML, 24 Kb, 2008-07-20 13:04:47; /chapters/glossary/hue.html
431. Beryl: A transparent to semitransparent, cyclo-silicate mineral species. Varieties of beryl are emerald, aquamarine, heliodor or golden beryl, bixbite, goshenite, maxixe, and morganite. Rare spelling: berylline. Sometimes showing chatoyancy and exhibiting star e; HTML, 24 Kb, 2008-07-20 13:03:14; /chapters/glossary/beryl.html
432. Light absorption: In optics, the reduction of the light intensity in transmission through an absorbing substance or in reflection from a surface, in crystals, minerals and gems. Absorption may vary with wavelengths of vibration in the direction of the transmitted light or; HTML, 24 Kb, 2008-07-20 13:05:33; /chapters/glossary/light-absorption.html
433. Wavelength: The distance between two points having the same phase on the following or preceding wave. The wavelength of electromagnetic radiation is equal to the velocity of the wave divided by its frequency =c/v. It is measured in nanometers unit.; HTML, 24 Kb, 2008-07-20 13:07:41; /chapters/glossary/wavelength.html
434. where to sell alexandrite in India at Alexandrite discussion forums | Alexandrite guide: where to sell alexandrite in India at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-12-24 20:55:14; /discussion/post/-where-to-sell-alexandrite-in-india-FRM-161-00012
435. colors and hardness of alexandrite at Alexandrite discussion forums | Alexandrite guide: colors and hardness of alexandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-12-24 21:19:21; /discussion/post/-colors-and-hardness-of-alexandrite-FRM-161-00014
436. X-ray spectrum: Several characteristic lines of the spectrum of X-ray, which are emitted by a bombardment of material with electrons such as curved dark lines on the films produced by X-ray method of powder diffraction of stone or minerals.; HTML, 24 Kb, 2008-07-20 13:07:55; /chapters/glossary/x-ray-spectrum.html
437. Volcanic rock: Generally a fine crystalline or glassy igneous rock, which is formed by the solidification of molten magma or lava on the Earth's surface during volcanic action. Such as basalt, obsidian, etc.; HTML, 24 Kb, 2008-07-20 13:07:32; /chapters/glossary/volcanic-rock.html
438. Young-Helmholtz theory of color vision: The theory that the eye contains three different groups of retinal fibers (cones) with maximum response to three primary colors to red-yellow, green, and blue violet, which are parts of the spectrum.; HTML, 24 Kb, 2008-07-20 13:08:04; /chapters/glossary/young-helmholtz-theory-of-color-vision.html
439. Moh's hardness scale: The most commonly used ten standard scale of relative hardness of minerals. The scale is expressed in numbers ranging from 1 through 10: (1) talc, (2) gypsum, (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum, (10; HTML, 24 Kb, 2008-07-20 13:05:49; /chapters/glossary/moh-s-hardness-scale.html
440. Alexandrium: An artificial gem comprised of lithium aluminum silicate and made in a variety of colors. Neodymium as a coloring agents yields pink lavender colors. A vivid, laser blue variety blue is colored by copper.; HTML, 24 Kb, 2008-07-20 13:03:07; /chapters/glossary/alexandrium.html
441. Yttrium: A dark gray, silvery luster, rare earth metallic element of the Periodic System with the symbol Y. Flammable when powder from. Used in alloys and as a metal deoxidizer.; HTML, 23 Kb, 2008-07-20 13:08:06; /chapters/glossary/yttrium.html
442. Flux inclusions: Inclusions, which are produce by hydrothermal synthetic emeralds by presence of wispy or veillike groups, manufactured by Chatham, Gilson, and Zerfass. That is an unmistakable characteristic of flux-fusion or flux-melt method.; HTML, 24 Kb, 2008-07-20 13:04:21; /chapters/glossary/flux-inclusions.html
443. Heated stone: Any gemstone that has been heated to change its color or improve the color, such as blue zircon, hyacinth, burnt amethyst, white chalcedony, smoky quartz and many aquamarines.; HTML, 23 Kb, 2008-07-20 13:04:42; /chapters/glossary/heated-stone.html
444. Re: Alexandrite Mine ( Zimbabwe) at Alexandrite discussion forums | Alexandrite guide: Re: Alexandrite Mine ( Zimbabwe) at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2010-08-16 19:24:41; /discussion/post/re-alexandrite-mine-zimbabwe-FRM-370-00001
445. alexandrite for sale at Alexandrite discussion forums | Alexandrite guide: alexandrite for sale at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-11-27 07:25:20; /discussion/post/-alexandrite-for-sale-FRM-168-00002
446. Density: The weight (mass) of a substance per unit volume at a stated temperature, measured in kilograms per cubic meter, Kg/m3 or gm/cm3. The comparison of the weight of a given space of a gemstone with the weight of a similar space of another gem.; HTML, 24 Kb, 2008-07-20 13:03:58; /chapters/glossary/density.html
447. Transparent: A gemstone permits the pass of electromagnetic radiation through it without distortion so that the object can be seen clearly and distinctive through it, such a quartz crystal. It is a see through effects.; HTML, 24 Kb, 2008-07-20 13:07:09; /chapters/glossary/transparent.html
448. The Alexandrite Effect at Alexandrite discussion forums | Alexandrite guide: The Alexandrite Effect at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-04-02 16:32:30; /discussion/post/the-alexandrite-effect-FRM-323-00002
449. Rough / Uncut Alexandrite. at Alexandrite discussion forums | Alexandrite guide: Rough / Uncut Alexandrite. at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-09-07 08:10:43; /discussion/topic/rough-uncut-alexandrite-FRM-350
450. Re: Tsarina rings at Alexandrite discussion forums | Alexandrite guide: Re: Tsarina rings at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2010-08-12 05:06:12; /discussion/post/re-tsarina-rings-FRM-287-00009
451. Privacy Policy for Alexandrite Tsarstone Collectors Guide: Alexandrite Guide's Privacy Policy is designed to help you understand how we collect and protect your personal information.; HTML, 38 Kb, 2008-07-18 15:01:27; /about/privacy/index.html
452. Heavy minerals: Minerals having a high specific gravity, which are separated in the laboratory from light minerals by use of heavy liquid, such as bromoform. Generally grains heavier than bromoform constitute the heavy minerals.; HTML, 24 Kb, 2008-07-20 13:04:43; /chapters/glossary/heavy-minerals.html
453. Yehuda treatment: A colorless glass-like material used as an impregnation or filling agent to improve the appearance and reduce the visibility of inclusions in stones such as diamonds and emeralds.; HTML, 24 Kb, 2008-07-20 13:08:01; /chapters/glossary/yehuda-treatment.html
454. 183 carat Rough Alexandrite For Sale at Alexandrite discussion forums | Alexandrite guide: 183 carat Rough Alexandrite For Sale at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2011-05-03 18:47:27; /discussion/topic/183-carat-rough-alexandrite-for-sale-FRM-421
455. Phase: The sum of homogeneous, physically distinct portion of matter in heterogeneous system, as the three phases; solid, liquid, or gas. Each phase may exist in different temperatures and pressures.; HTML, 24 Kb, 2008-07-20 13:06:18; /chapters/glossary/phase.html
456. Phenomenon: A special optical occurrence, or circumstance observed or are visible in certain gemstones such as chatoyancy, asterism, or play of color, adularescence, girasol, labradorescence, opalescence, schiller, etc.; HTML, 24 Kb, 2008-07-20 13:06:20; /chapters/glossary/phenomenon.html
457. Jewelry: A number of decorative articles made artistically of gold, platinum, silver, and precious stones that are worn for personal adornment, such as bracelets, rings, necklaces, etc.; HTML, 23 Kb, 2008-07-20 13:05:11; /chapters/glossary/jewelry.html
458. Refractive index measurement: Several methods are available for the measurement of refractive indices such as refractometer for total reflection, immersion method in liquid for Beck effect, shadow method, and minimum deviation method.; HTML, 24 Kb, 2008-07-20 13:06:44; /chapters/glossary/refractive-index-measurement.html
459. heat treatment of alexandrite at Alexandrite discussion forums | Alexandrite guide: heat treatment of alexandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-10-25 13:26:39; /discussion/post/-heat-treatment-of-alexandrite-FRM-161-00006
460. Copyright, Use of Content and Content license: Alexandrite Tsarstone Collectors Guide copyright policy and license for use of content; HTML, 39 Kb, 2008-07-18 15:01:10; /about/copyright/index.html
461. Zonary growth: Zonary growing of crystals bounded by plane crystal faces, which occur by slight variation in the composition of a crystal due to separation or interruptions of the crystal phases during growth.; HTML, 24 Kb, 2008-07-20 13:08:10; /chapters/glossary/zonary-growth.html
462. Re: New Book: Russian Alexandrites by Dr. Karl Schmetzer at Alexandrite discussion forums | Alexandrite guide: Re: New Book: Russian Alexandrites by Dr. Karl Schmetzer at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2010-11-27 21:18:00; /discussion/post/re-new-book-russian-alexandrites-by-dr-karl-schmetzer-FRM-375-00001
463. Perovskite: Prized by collectors. Synthetic strontium titanate or fabulite found in a similar manner to perovskite. Natural counterpart of fabulite with the same composition is called tausonite.; HTML, 23 Kb, 2008-07-20 13:06:16; /chapters/glossary/perovskite.html
464. Re: Rough / Uncut Alexandrite. at Alexandrite discussion forums | Alexandrite guide: Re: Rough / Uncut Alexandrite. at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-09-16 05:37:33; /discussion/post/re-rough-uncut-alexandrite-FRM-350-00001
465. GIA Gem Trade Laboratory: A subsidiary company of the Gemological Institute of America Enterprises, which provides professional grading and identification for the diamond and colored stone industries.; HTML, 24 Kb, 2008-07-20 13:04:36; /chapters/glossary/gia-gem-trade-laboratory.html
466. Useful tool for beginners at Alexandrite discussion forums | Alexandrite guide: Useful tool for beginners at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2007-08-27 10:30:09; /discussion/topic/useful-tool-for-beginners-FRM-172
467. "Tatiana" alexandrite ring at Alexandrite discussion forums | Alexandrite guide: "Tatiana" alexandrite ring at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2010-08-12 05:06:00; /discussion/post/-tatiana-alexandrite-ring-FRM-287-00010
468. Usenet, Google Groups, Alexandrite at Alexandrite discussion forums | Alexandrite guide: Usenet, Google Groups, Alexandrite at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2006-12-17 17:57:01; /discussion/topic/usenet-google-groups-alexandrite-FRM-155
469. Radium fluorescence: Radium treatment of minerals such as beryl to produce a bluish-white fluorescence only on the basal planes. Under SWUV and LWUV light beryl fluoresces bluish-white.; HTML, 23 Kb, 2008-07-20 13:06:38; /chapters/glossary/radium-fluorescence.html
470. Laminate: A rock or mineral in plate form consisting of several different layers bonded by or cemented together, which is separated or split into thin layers.; HTML, 23 Kb, 2008-07-20 13:05:27; /chapters/glossary/laminate.html
471. Novosibirsk synthetic alexandrite: Synthetic alexandrite made in three methods in Russia, (a) growing synthetic stones of solution-growth process or flux process specially for alexandrite, (b) Growing stone of floating-zone process. (c) Melt-grown process or so-called pulling method.; HTML, 24 Kb, 2008-07-20 13:06:00; /chapters/glossary/novosibirsk-synthetic-alexandrite.html
472. Ultramafic: A type of igneous rock characterized by a high content of mafic minerals, particularly olivine, pyroxenes, amphiboles, etc. The silica content is less than 45%.; HTML, 23 Kb, 2008-07-20 13:07:15; /chapters/glossary/ultramafic.html
473. China Stone: HTML, 64 Kb, 2009-03-30 07:29:18; /directory/gemstone-dealers/china-stone-wdd-003-00030.html
474. Gemstone cuts: Any forms or styles used in the fashioning of gemstones such as antique cut, brilliant cut, emerald cut, baguette, cabochon, rose cut, etc.; HTML, 23 Kb, 2008-07-20 13:04:32; /chapters/glossary/gemstone-cuts.html
475. Orientation crystal: The placing of atoms or radicals in a crystal so that they point in a definite direction, or its crystallographic axes are in the conventional position.; HTML, 23 Kb, 2008-07-20 13:06:09; /chapters/glossary/orientation-crystal.html
476. Facet: A term applied to a polished plane-geometrical surface of a cut diamond or other gemstone of various shapes and sizes. In French spelled facette.; HTML, 23 Kb, 2008-07-20 13:04:18; /chapters/glossary/facet.html
477. Weight of gemstones and precious metals: A standard mass. The unit of weight of gemstones since 1913, is the international metric carat or decimally of them in points.; HTML, 23 Kb, 2008-07-20 13:07:44; /chapters/glossary/weight-of-gemstones-and-precious-metals.html
478. Pala International: HTML, 64 Kb, 2009-03-30 07:51:42; /directory/gemstone-dealers/pala-international-wdd-003-00032.html
479. Re: Very modern, sleek Alexandrite ring at Alexandrite discussion forums | Alexandrite guide: Re: Very modern, sleek Alexandrite ring at Alexandrite discussion forums | Alexandrite guide; HTML, 25 Kb, 2009-03-19 23:48:26; /discussion/post/re-very-modern-sleek-alexandrite-ring-FRM-287-00003
480. Beryllium: A steely, uncorrodible, white metallic element, in the group II of the Periodic System, with the chemical symbol Be. Used as an alloy.; HTML, 23 Kb, 2008-07-20 13:03:16; /chapters/glossary/beryllium.html

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Alexandrite

alexandrite natural of photo stone

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