gemology World Canadian Institute of gemmology — a resource for the general gems Precious stones -features Ask a gemologist and the gem Images Gallery

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Materials cover general topics central to gemology, mineralogy, and geology; with http//www.geology.wisc.edu/

jill/2. A gem stones gemstones Crystals Jewelry

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gemology THE MYSTERY HIDDEN IN stones. Some of the stones have uniform colours likeyellow, green, red, blue, violet, black or Each gem has its own importance.

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Extractions. Advance Search GEMOLOGY: THE MYSTERY HIDDEN IN STONES O ur great sages and polymaths perfected the art and the science of astrology in ancient times. As such astrology has witnessed continuous development and proliferated into many branches and divisions, all of which are equal in importance. Gemmology or the scientific and ethnic study of gemstones is an important and integral part of applied astrology. It is so popular among the Indian public that no one is certain as to when it had actually come into practice. Use of precious gems and stones has been an ancient practice in India. Some people believe that it is one or two thousand years old science while others maintain that science and art of gemmology originated about five or ten thousand years ago. Scriptural evidences however show that concept of gemmology is as old as the creation itself. A very famous hymn says: During medieval period also, various scholars shed light on the science of gemmology. They authored many great scriptures as well. Acharya Varahmihir was the most prominent of those great scholars. A scripture Vrihat Samhita written by Varahmihir still has a wide recognition among the gemologists. It has a whole chapter, Ratnadhyay devoted to the comprehensive description of the gemstones. Among Puranas, Agnipurana contains exhaustive description about gemmology.

gem stones jewelry stores online, blue yellow pink green fancy saphire The point ofcontact between gem and hemisphere will appear as a 1 gems gemology, Vol.

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Extractions. star sapphire gemstone loose gemstones semi-precious. pink sapphire gem stones jewelry stores online, blue yellow pink green fancy saphire saphires, ruby gems tone rubies ruby gemstone loose sapphire ruby ring ceylon sapphire. gem stones conforming to that of the gem surface (i.e. round or oval with cabochons, the shape of the facet of a faceted stone). The spot appears to move in relation to the scale as the angle of observation changes. If you are looking directly down on the low-number portion of the scale, and the gem has a high index, the spot will appear entirely dark. If the portion of the scale numerically higher than the reading is viewed directly, the spot will appear as a ring with a light center. At the point on the scale corresponding to the refractive index of the stone, the spot will be half dark and half light, often showing the conventional blue -green spectrum at the division between light and dark (see Fig. 5-11). In general, the dark half is on the low-number end of the scale, but curved surfaces, while otherwise conforming to the results described above, may give readings that are light on the low-number half of the spot at the correct reading, and dark on the high-number half. Caution: If the spot is as small as it should be, the change of the spot from dark to light is often abrupt as the eye moves toward the higher numbers.

fracture, glass perhaps more so than genuine stones. Since each gem has a characteristichardness, the of hardness in both mineralogy and gemology, consists of

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Extractions. star sapphire gemstone loose gemstones semi-precious. pink sapphire gem stones jewelry stores online, blue yellow pink green fancy saphire saphires, ruby gems tone rubies ruby gemstone loose sapphire ruby ring ceylon sapphire. gem stones FALSE CLEAVAGE (PARTING). Parting or false cleavage is a flat, smooth break that occurs parallel to planes of weakness caused by repeated twinning (production of twin crystals). Among important gemstones, it is sometimes found in rubies and sapphires. FRACTURE. Fracture can be compared to wood splitting across rather than along the grain. It takes several forms that can be described by their distinctive appearances. The following are the most common: HARDNESS. Hardness, which depends upon the cohesion or force of attraction between atoms, can be defined as resistance to scratching or abrasion. Since each gem has a characteristic hardness, the hardness test may provide a clue to a gemstone’s identity. Even though the possibility of damage to transparent gemstones seriously limits the test’s value, it could be useful in identifying opaque gemstones. The Mohs scale, which is the standard scale of hardness in both mineralogy and gemology, consists of the following min erals arranged in order of decreasing hardness:

How Rare is That gem? Putting things into perspective. Where did it go? A guideto finding lost stones. gemology The Study of gemstones. IGS gemology Course.

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Canadian Institute of gemology Canadian laboratory with gem gem Fashion Virtual communityof jewelers, designers the myths surrounding the stones, their healing

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new used grit supplies lapping, tumbling, Oregon, jewelry gem stones crystals metaphysical articleson Burma ruby, sapphire and jade, gemology, diamond grading

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houses, jewelers, gemologists, collectors, manufacturers, gem traders, miners referencebook to gems, stones and bones gemology by Cornelius S. Hurlbut, Robert C

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Extractions. Paperback, 160 pages Flexi edition (March 1994), Dimensions (in inches): 0.56 x 8.52 x 5.93 Price: USD 15.16 Over 130 gemstones are depicted with description, occurrence, composition, crystal structure, luster, and other details. Very good reference book to gems, stones and bones used in jewelry and ornamentations. Easy to use and read. Gemology by Cornelius S. Hurlbut, Robert C. Kammerling Hardcover, 352 pages 2nd edition (January 1991), Dimensions (in inches): 0.94 x 9.54 x 7.79 Price: USD 175.00 This book is an excellent source of information for people interested in the field of gemmology. We have found that the contents covers a wide range of topics and presented in an easily understood format. It is a concise and well-illustrated book which makes it ideal as a reference book. Dictionary of Gems and Gemology by Mohsen Manutchehr-Danai

MODULE 1 Influence of gems; The mystical and divine powers of preciousgems; The most powerful semiprecious gem stones. MODULE 2 Selection

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This is a do it your self guide to learning the fundamentals of gemology andgem appreciation for those who do not gem stones Eyewitness handbooks Hall.

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Extractions. GEMSTONES GEMS: Webster Since it was first published in 1962. Gems, written by Robert Webster and revised in its fourth edition by Basil Anderson, has become universally recognized as the most comprehensive and Authorative treatise on gem materials in the English language. In its fifth edition, edited by Peter Reed, the forty chapters, appendices and tables have been revised by fifteen gemologists chosen for their expertise in the relevant sections. (soft cover) 1,072 Pages GUIDE TO AFFORDABLE GEMOLOGY- Hanneman This is a do it your self guide to learning the fundamentals of gemology and gem appreciation for those who do not wish to invest $10,000 or more in this activity. With this approach, your total expenditure should be less than $450. Gem identification consists of a process of elimination based on the results of specific teats, e. g. specific gravity. refractive index, birefringence, optic character, spectroscopy and magnification. The author has spent a quarter century developing inexpensive and innovative instruments to perform these tests. (soft cover) 172 Pages GEMSTONES OF NORTH AMERICA VOL III- Sinkankas This new and final volume presents Sinkankas’s continuing research and up dates the development of the older, well-established gem deposits. Enhanced by maps of localities and full-color photo’s by Erica and Harold Van Pelt.

from Geogem. gemology Lapidary Pages covers topics from how tocut and polish gem stones, to grading them. Instituto Brasileiro

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Extractions. GEOMOLOGY send your links Gemmology and Gemstones in Scotland Gemmology Overview — from Geogem. — covers topics from how to cut and polish gem stones, to grading them. Instituto Brasileiro de Gemas e Metais Preciosos — IBGM is the official page of the Brazilian Institute of Gems and Precious Metals. Introductory Gemmology — definitions concerning physical properties of gemstones. American Gem Society Asian Institute of Gemology Sciences — offers programs in gemology. Gemmological Association and Gem Testing Laboratory of Great Britain Gemological Institute of America International Colored Gemstone Association — information resource with shopping tips, the latest market news, and Gem-o-Rama. International Gem Society — dedicated to bringing quality information and educational services to everyone interested in gemstones. International Gemological Institute Gemology World — Can. Institute of Gemmology Basic Optics Notes for Gemology Sindhar Institute Of Gemology. rogram Texas Institute of Jewelry Technology’s. Gemology Resource Web Russian Gemological Server Welcome to Gemological World !

Spiritual Value of gem stones by Wally Richardson Cunningham’s Encyclopedia ofCrystal, gem, and Metal Complete Science of Planetary gemology — by Richard S

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Extractions. Healers believe that gems and crystals can focus and enhance natural healing energy. They work electromagnetically by strengthening each person’s natural abilities to heal themselves and to send, receive and store information and healing energy. They are excellent personal growth tools that conduct universal energy, light, intentionally and electrical energy for healing. They have the ability to amplify, store, transmute, focus, and radiate high vibratory frequencies including healing light, color, sound, image, and electromagnetic waves into our body’s chakras and energy fields. Gems helps to reduce blocks, bringing our mental, spiritual, emotional, and physical vibratory frequencies into alignment. Uses Healing, stress, or stress related disorders, arthritis, and pain management, spiritual growth, intuitive growth, and relaxation. Also see: The 13 Flames

gemology and Lapidary Pages. John Miller. This site has a database of the rocksand minerals used as gem stones and has physical information about each.

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Extractions. Geology — Minerals and Gems — Gems Return to Geology Main Page Photo courtesy of John Betts Fine Minerals Buy Books About Rocks and Minerals There is a fine line between the enjoyment of nature and turning it into jewelry. Nearctica is concerned with nature in the raw, so to speak. Therefore only a few sites are listed here for those interested in lapidary techniques. Gemology and Lapidary Pages. John Miller. A great site for those who like, or aspire, to cut and polish gems. The site is rife with information including identifying gemstones, cutting and polishing them in all different styles, information about gems as investments, and a gallery of gem photographs. Highly recommended. The Eclectic Lapidary. An online journal with articles on all aspects of lapidary work. In addition the site has forums you can enter and a trading post. Delta Bravo. If you go crazy over natural emerald crystals, like I do, you will love this site with a gallery of incredible emerald crystals from Colombia. There are also sections on emerald mines in Colombia, their characteristics, and (if you are very well healed) specimens for sale. Balls of Fire Agate Mine. A commercial site with a gallery of fire agate photographs and information about the formation and collecting of fire agate. Rainbow of Gems. This site has a database of the rocks and minerals used as gem stones and has physical information about each.

these requirements may write the American gem Trade Association Sometimes dyed toimitate other stones. gemology WORLD Wolf Kuehn, Webmaster webmaster@cigem.ca

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Extractions. Introduction I This manual sets forth proper methods to comply with the FTC Guides. With the exception of the normal fashioning (cutting and polishing) of a diamond and other gemstones, it is the seller’s responsibility at the time of sale to provide all informations pertinent to the enhancement of a natural gemstone. If the stone is man-made, it is also the seller’s responsibility to disclose that fact. This information is required by the Federal Trade Commission (FTC).

to Mr. Sarosi, this tourmaline presents some unusual challenges to the gem cutter Alarger than expected number of stones break during faceting, and a few have

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Extractions. At the 1997 Tucson AGTA show, one of the authors (CYW) saw some unusual tourmalines that were reportedly from recent workings in Zambia. Marc Sarosi Co. of Los Angeles, was marketing this material as mixed-color tourmaline: Colors available include light to medium toned desaturated pink, orange, green, and yellowish green, as well as colorless, and individual fashioned stones frequently contain regions of two or more of these colors. Coincidentally, we found that the chemistry of these tourmalines was unusual, with elevated contents of Bismuth(Bi). Location and Access The multi colored tourmalines described in this report were found in a field in the Kalungabeba area of the Lundazi district, according to Mr. Sarosi, who visited the site in early 1997. The stones were originally discovered by a person who was digging a hole for an outhouse. A rough dirt road leads to this site from Lundazi; it is best traveled by four-wheeled drive vehicle. During the rainy season, from about late December until March, the area is often inaccessible. Mining and Production The Kalungabeba deposit is alluvial, and the tourmaline-bearing gravel also contains spessartine, aquamarine, and dispersed quartz. At the time of Mr. Sarosi’s visit, there were no known gem-bearing pegmatites in the immediate vicinity of this field, although Mr. Sarosi reports that subsequent mining has unearthed spessartine garnet-bearing pegmatites.

This locality for a new gem discovery will be in gems and gemology, gem Notes (Weare currently cutting some very fine stones.) Ask for our list. 17.80 ct

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Ratna is the Sanskrit Word for gem, the precious stones. The word Ratnais used in conferring Titles like Bharat Ratna, Pandita Ratna, etc.

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Extractions. 1) Your ruling planet 2) Suitable gem and color 3) Minimum weight in carats 4) The metal used in making the ring 5) The week-day and the time when to wear 6) The finger 7) The substitutes 8) The weight of substitutes. ARIES: The ruling planet is Mars, color red, Red coral is the suitable Birth stone. It should be minimum 6 carats in weight. The Red coral should be set in a gold ring mixed with copper and it should be worn in the ring finger of the right hand on an auspicious Tuesday, in bright half of the month, an hour after sunrise. Semi precious stones like Carnelian, Red jasper and Blood stones may be used as substitutes. TAURUS: The ruling planet is Venus, color bright white, Diamond is the suitable birth stone. A pure diamond of atleast one and half carat should be set in a ring of silver or platinum, and worn on Friday morning in the little finger of the right hand. Semi precious stones like White rock crystal of 11 carats or the sapphire, Tourmaline or Zircon of white color, not less than 3 or 4 carats can be used as substitutes for the diamond. GEMINI: The ruling Planet is Mercury, color is GREEN. The suitable stone is EMERALD. A genuine emerald of not less than 3 carats in weight, studded in a silver ring, should be worn in the little finger of the right hand on an auspicious Wednesday, two hours after sunrise. Peridot, Aquamarine, Green Tourmaline, Green Agate, Sardonyx or jade can be worn as substitutes.

the degree of change was different for some stones. effects of postal sanitizationon gem materials, see the upcoming Winter 2001 issue of gems gemology.

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Extractions. November 27, 2001 — The jewelry industry relies heavily on the U.S. Postal Service to ship gems and jewelry throughout the United States. As most are aware, the recent incidences of people being infected by anthrax spores sent through the mail has caused the USPS to seek ways to protect postal employees and the public from this potential threat. One part of this effort is to use a technique that actually kills anthrax spores (and other biological agents) in the mail as it is being processed. One company with which the postal service has contracted, SureBeam (a subsidiary of Titan Corp.), makes equipment designed to combat food-borne pathogens such as salmonella. SureBeam provides a type of linear accelerator that creates a beam of high-energy electrons. In effect, they are using irradiation to kill the microorganisms that often contaminate food. The Process A spokesman for SureBeam told us that the actual dosage being used by the postal system is 56 kilograys, which is equivalent to 5.6 megarads. This figure was later confirmed by Laura Smith, Quality Assurance Manager for Titan Scan Technologies, another Titan Corp. subsidiary, who agreed to run tests for us under the same conditions that are being used by the post office.