техника безопасности при работе с маятниковой пилой
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техника безопасности при работе с маятниковой пилой, List of Gemstones: Precious and Semi-Precious Stones - Gem Society, Gemstone List - Names, Colors & Types of Gems | GemSelect, The A to Z List of Crystals and Their Meanings - Gems of Nature, Gemstone Names by Colour, Type & Origin - Complete List | GemPundit, GIA Gem Encyclopedia | Complete List Of Gemstones, List of gemstones by species - Wikipedia, List of 24 Gemstones with Names, Colors, & Pictures - Petra Gems.
Alexandrite AlexandriteGreen in sunlight. Red in lamplight. Color-changing alexandrite is nature’s magic trick.The FactsIt’s the color-change variety of the mineral, chrysoberyl. Bluish green in daylight, purplish red under incandescent light; hard and durable. Top quality examples are rare and valuable.Amber AmberAmber is nature’s time capsule. This fossilized tree resin contains remnants of life on earth millions of years ago.The FactsFossilized resin, color of the burnished sun--orange or golden brown. Amber might trap and preserve ancient life, including insects, leaves, even scorpions and occasionally lizards.Amethyst AmethystThe essence of the color purple, amethyst is beautiful enough for crown jewels yet affordable enough for class rings.The FactsPurple variety of the mineral quartz, often forms large, six-sided crystals. Fine velvety-colored gems come from African and South American mines. In demand for jewelry at all price points.Ametrine AmetrineThis transparent quartz has colors of both amethyst and citrine, and is called ametrine or amethyst-citrine.The FactsAmetrine, one of the rarest types of transparent quartz, combines two colors: amethyst’s purple and citrine’s orange-to-yellow, growing together in a single crystal.Aquamarine AquamarineNamed after seawater, aquamarine’s fresh watery hue is a cool plunge into a refreshing pool.The FactsBlue to slightly greenish-blue variety of the mineral beryl. Crystals are sometimes big enough to cut fashioned gems of more than 100 carats. Well-formed crystals might make superb mineral specimens.Citrine CitrineCitrine is the transparent, pale yellow to brownish orange variety of quartz. The FactsCitrine’s color comes from traces of iron. It’s perhaps the most popular and frequently purchased yellow gemstone and an attractive alternative for topaz as well as for yellow sapphire.Diamond DiamondDiamonds are among nature’s most precious and beautiful creations.The FactsThis hardest gem of all is made of just one element: carbon. It’s valued for its colorless nature and purity. Most diamonds are primeval—over a billion years old—and form deep within the earth.Fancy Color Diamond Fancy Color DiamondDazzling brilliance. Captivating color. The planet’s most valued gems are fancy color diamonds.The FactsFine color diamonds are the most rare and costly of all gemstones. Their ranks include the world’s most famous jewel—the Hope—and the most expensive gem ever auctioned—The Graff Pink.Emerald EmeraldEmerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.The FactsThe most valued variety of beryl, emerald was once cherished by Spanish conquistadors, Inca kings, Moguls, and pharaohs. Today, fine gems come from Africa, South America, and Central Asia.Garnet GarnetGarnets are a set of closely related minerals forming a group, with gemstones in almost every color.The FactsThe garnet group of related mineral species offers gems of every hue, including fiery red pyrope, vibrant orange spessartine, and rare intense-green varieties of grossular and andradite.Iolite IoliteAccording to legend, Vikings used iolite slices to reduce glare when checking the sun’s position. The FactsKnown in the jewelry trade as iolite, this mineral is known as cordierite to geologists and mineralogists. It was named after French mineralogist Pierre Cordier. Jade Jade“Jade” is a generic term for nephrite, jadeite, and under certain conditions green omphacite. In China, a pierced jade disk is a symbol of heaven.The FactsPrized by civilizations from ancient China to the Aztecs and Mayans of Central America, jade is crafted into objects of stunning artistry.Kunzite KunziteCollectors love kunzite for its color range, from delicate pastel pink to intense violetish purple.The FactsTrace amounts of manganese give this pink to violet variety of spodumene its feminine glow. A relative newcomer to the gemstone stage, kunzite was only confirmed as a unique variety of spodumene in the early part of the twentieth century.Lapis Lazuli Lapis LazuliLapis is a beautiful rock; an aggregate of several minerals, mainly lazurite, calcite, and pyrite.The FactsLapis lazuli is treasured for its beautiful deep blue color. Afghanistan is considered the source of the best-quality lapis.Moonstone MoonstoneA ghostly sheen moves under the surface of this feldspar, like moonlight glowing in water.The FactsFeldspar prized for its billowy blue adularescence, caused by light scattering from an intergrowth of microscopic, alternating layers. Favored gem of many Art Nouveau jewelry designers.Morganite MorganiteMorganite is the pink to orange-pink variety of beryl, a mineral that includes emerald and aquamarine.The FactsLike its cousins emerald and aquamarine, morganite is a variety of the beryl mineral species. This gem gets its subtle blush when a trace amount of manganese makes its way into morganite’s crystal structure.Opal OpalFireworks. Jellyfish. Galaxies. Lightning. Opal’s shifting play of kaleidoscopic colors is unlike any other gem.The FactsOpal’s microscopic arrays of stacked silica spheres diffract light into a blaze of flashing colors. An opal’s color range and pattern help determine its value.Pearl PearlPerfect shining spheres. Lustrous baroque forms. Seductive strands, warm to the touch. Pearls are simply and purely organic.The FactsProduced in the bodies of marine and freshwater mollusks naturally or cultured by people with great care. Lustrous, smooth, subtly-colored pearls are jewelry staples, especially as strands.Peridot PeridotFound in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gemThe FactsYellow-green gem variety of the mineral olivine. Found as nodules in volcanic rock, occasionally as crystals lining veins in mountains of Myanmar and Pakistan, and occasionally inside meteorites.Rose Quartz Rose QuartzRose quartz is a quartz variety that gets its name from its delicate pink color. The FactsMicroscopic mineral inclusions cause the pink color and translucence of rose quartz. Well shaped, transparent pink quartz crystals are rare.Ruby RubyRuby is the most valuable variety of the corundum mineral species, which also includes sapphire.The FactsTraces of chromium give this red variety of the mineral corundum its rich color. Long valued by humans of many cultures. In ancient Sanskrit, ruby was called ratnaraj, or “king of precious stones.”Sapphire SapphireThe name “sapphire” can also apply to any corundum that’s not ruby, another corundum variety.The FactsDepending on their trace element content, sapphire varieties of the mineral corundum might be blue, yellow, green, orange, pink, purple or even show a six-rayed star if cut as a cabochon.Spinel SpinelThe Black Prince’s Ruby. The Timur Ruby. For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels.The FactsAlthough frequently confused with ruby, spinel stands on its own merits. Available in a striking array of colors, its long history includes many famous large spinels still in existence.Sunstone SunstoneSunstone’s phenomenal varieties show a distinct and lively glitter called aventurescence.The FactsSunstone, a member of the feldspar group, can be an orthoclase feldspar or a plagioclase feldspar, depending on chemistry. Both can show aventurescence. “Sunstone” applies to the gem’s appearance.Tanzanite TanzanitePoised between lush blue, vibrant violet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro.The FactsNamed for Tanzania, the country where it was discovered in 1967, tanzanite is the blue-to-violet or purple variety of the mineral zoisite. It’s become one of the most popular of colored gemstones.Topaz TopazHoney yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.The FactsColorless topaz treated to blue is a mass-market gem. Fine pink-to-red, purple, or orange gems are one-of-a-kind pieces. Top sources include Ouro Prêto, Brazil, and Russia's Ural Mountains.Tourmaline TourmalineTourmalines have a variety of exciting colors with one of the widest color ranges of any gem.The FactsComes in many colors, including the remarkable intense violet-to-blue gems particular to Paraíba, Brazil, and similar blues from Africa. Favorite of mineral collectors.Turquoise TurquoiseAzure sky, robin’s egg blue: Vivid shades of turquoise define the color that’s named after this gem.The FactsAncient peoples from Egypt to Mesoamerica and China treasured this vivid blue gem. It’s a rare phosphate of copper that only forms in the earth’s most dry and barren regions.Zircon ZirconZircon is a colorful gem with high refraction and fire that’s unfairly confused with cubic zirconia.The FactsOptical properties make it bright and lustrous. Best known for its brilliant blue hues; also comes in warm autumnal yellows and reddish browns, as well as red and green hues., New to gemstones? Curious about the different kinds of gemstones? Check out our gemstones list and discover a world of precious and semi-precious stones., Browse our gemstone list with names, colors, and types of gems. Explore natural gems like ruby and sapphire at GemSelect for jewelry or collecting..
There are lots of crystals out there and they all have their own meanings and properties, which can make it a bit daunting if you are just getting into the amazing world of crystals., Gemstones are more than just ornamental, they carry meaning, energy, and purpose. From precious stones to healing crystals, each type serves a unique role, whether for beauty, astrology, or wellness., GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos & research., This is a list of gemstones, organized by species and types. There are over 300 types of minerals that have been used as gemstones. Such as: There are a number of artificial and lab grown minerals used to produce gemstones. These include: There are a number of organic materials used as gems, including: Some rocks are used as gems, including:, Gemstones have played numerous roles in the myths and tales of human societies throughout history. Although some are believed to have unique powers, each shares a typical beauty, distinct with a unique color, birthplace, and story., From rare precious stones to vibrant semi-precious gems, this complete list of gemstones explores their classifications, origins, and how they influence modern jewelry design..