Gemstone

A gemstone is a piece of mineral, which, in cut and polished form, is to make jewelry or other adornments. However, certain rocks and organic materials are not minerals, but are for jewelry, and are therefore often gemstones as well. Most gemstones are hard, but some soft minerals are in jewelry because of their luster or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity until the 19th century engraved gems and hard stone carvings such as cups were major luxury art forms the carvings of Carl Faberge were the last significant works in this tradition. The traditional classification in the West begins with a distinction between precious and semi-precious stones; similar distinctions are in other cultures. In modern usage, the precious stones are diamond, ruby, sapphire and emerald, with all other gemstones being semi-precious. Other stones are by their color, translucency and hardness. The traditional distinction does not necessarily reflect modern values, for example, while garnets are relatively inexpensive, a green garnet called Tsavorite, can be far more valuable than a mid-quality emerald. Another term for semi-precious gemstones used in art history and archaeology is hard stone. In modern times gemologists, who describe gems and their characteristics using technical terminology specific to the field of gemology, identify gemstones. The first characteristic a gemologist uses to identify a gemstone is its chemical composition. For example, diamonds are made of carbon and rubies of aluminum oxide. Next, many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. For example diamonds, which have a cubic crystal system, are often as octahedrons. Gemstones are into different groups, species, and varieties. Ruby is the red variety of the species corundum, while any other color of corundum is sapphire. Emerald (green), aquamarine (blue), red beryl (red), goshenite (colorless), heliodor (yellow), and morganite (pink) are all varieties of the mineral species beryl. Gems are in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture, and luster. They may exhibit pleochroism or double refraction. They may have luminescence and a distinctive absorption spectrum. There is no universally accepted grading system for gemstones. Diamonds are using a system developed by the Gemological Institute of America (GIA) in the early 1950s. Historically, all gemstones were using the naked eye. The GIA system included a major innovation: the introduction of 10-x magnification as the standard for grading clarity. Other gemstones are still using the naked eye. A mnemonic device, the color, cut, clarity and carat, has been to help the consumer understand the factors used to grade a diamond. With modification, these categories can be useful in understanding the grading of all gemstones. The four criteria carry different weight depending upon whether they are to colored gemstones or to colorless diamond. In diamonds, cut is the primary determinant of value, followed by clarity and color. Diamonds are to sparkle, to break down light into its constituent rainbow colors chop it up into bright little pieces and deliver it to the eye (brilliance). In its rough crystalline form, a diamond will do none of these things; it requires proper fashioning cut. In gemstones that have color, including colored diamonds, it is the purity and beauty of that color that is the primary determinant of quality. Physical characteristics that make a colored stone valuable are color, clarity to a lesser extent cut, unusual optical phenomena within the stone such as color zoning, and Astoria (star effects). The Greeks, for example, greatly valued Astoria in gemstones, which were as a powerful love charm, and Helen of Troy was to have worn star-corundum. Aside from the diamond, the ruby, sapphire, emerald, pearl and opal have also been precious. Up to the discoveries of bulk amethyst in Brazil in the 19th century, amethyst was a precious stone as well, going back to ancient Greece. Even in the last century, certain stones such as aquamarine, peridot and cat's eye have been popular as precious. Many gemstones are in even the most expensive jewelry, depending on the brand name of the designer, fashion trends, market supply, treatments etc. Nevertheless, diamonds, rubies, sapphires and emeralds still have a reputation that exceeds those of other gemstones. Rare or unusual gemstones, generally meant to include those gemstones, which occur so infrequently in gem quality that they are scarcely except to connoisseurs, include andalusite, axinite, cassiterite, clinohumite and red beryl. Gem prices can fluctuate heavily. In general, per carat, prices of larger stones are higher than those of smaller stones, but popularity of certain sizes of stone can affect prices.

Infomercial portmanteau

The word "infomercial" is a portmanteau of the words "information" and "commercial". As in any other form of advertisement, the content is a commercial message designed to represent the viewpoints and to serve the interest of the sponsor. Infomercials are often made to closely resemble actual television programming. Some imitate talk shows and try to downplay the fact that the program is actually an advertisement. A few are developed around storylines and have been called storymercials. However most do not have specific formats but craft different elements to create what they hope is a compelling story about the product offered. Infomercials are designed to solicit a direct response which is specific and quantifiable and are, therefore, a form of direct response marketing. For this reason, infomercials generally feature between 2 and 4 internal commercials of 30 to 120 seconds in length which invite the consumer to call or take other direct action. Despite the overt request for direct action, many consumers respond to the messages in an infomercial with purchases at retail outlets. For many infomercials, the largest portion of positive response they aim for is retail sales. These retail sales make infomercials similar in impact to traditional commercials where advertisers do not solicit a direct response from viewers, but create the commercials with a goal to leave behind messages and brand that the advertisers hope will lead people to purchase their product or increase acceptance of the product. Many traditional Infomercial producers make use of flashy catchphrases, repeat basic ideas, and/or employ scientist-like characters or celebrities as guests or hosts in their ad. The book As Seen on TV (Quirk Books) by Lou Harry and Sam Stall highlights the history of products as the Flowbee, the Chia Pet, and Ginsu knives. Sometimes traditional infomercials use limited time offers and/or claim one can only purchase the wares from television to add pressure for viewers buy their products. The products frequently marketed through Infomercials include cleaning products, appliances, food, dietary supplements, alternative health aids, memory improvement courses, books, recorded music, videos, real estate investment strategies, beauty supplies, baldness remedies, sexual enhancement supplements, weight loss products, personal fitness devices, home exercise machines. Major brands have used infomercials for their ability to communicate more complicated and in-depth product stories. This practice started in the early 1990s and has increased since. Brands generally eschew the "cheesy" trappings of the traditional infomercial business in order to create communication they believe creates a better image of their products, their brands, and their consumers.Acne Drug - The most Comprehensive Acne drug options for consumers and professionals including user ratings, reviews and drug dosage information. Acne Products Site - There are many products available for the treatment of acne, many of which are without any scientifically proven effects. Generally speaking, successful treatments show little improvement within the first two weeks, instead taking a period of approximately three months to improve and start flattening out Attorneys On Duty - The Attorney's Duty of Confidentiality and the Attorney Client Privilege Cazo Jewelry - Cazo Jewelry is the Best Value on the Internet with The Best shopping for gifts online Earrings are jewelry attached to the ea Deans Insurance - Dean is a leading integrated healthcare system, offering primary and specialty care and a wide range of highly rated health insurance products Gordons Jewelry - From engagement rings to fashionable fine jewelry in classic to contemporary styles, Gordons Jewelers offers customers the perfect jewelry and gift items Las Vegas Luxury Autos - Luxury autos with complete vehicle description including multiple photos of every vehicle in stock. Models Village - Models Village is an online fashion community designed for Professional Models, Aspiring models, Photographer. A miniature park may contain a model of a single city or town, often called a miniature city or model village