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Fine Jewelry University Articles matching: “Opaal green stone 10 k”
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Fine Jewelry University (Show All FJU Articles)
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Gem in the Spotlight: Peridot
Peridot is a lovely yellow-green gem with a rich history. Legend has it that Peridot was the favorite gemstone of Cleopatra. The ancients called it … that peridot could chase away evil spirits and dissolve curses but only when set in gold. Peridot is the birthstone for August. It is also the accepted anniversary gemstone for the 16th year of marriage. Peridot’s unique yellow-green … name “Peridot” is simply a French word derived from the Arabic for green. Peridot’s color ranges from yellow-green to a warm olive green, and it is distinguished by its soft appearance. Color is the most important characteristic when …
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Gem in the Spotlight: Tsavorite Garnet
…, all with the time tested durability of garnet. Tsavorite is a unique form of garnet with a stunningly vivid green color. It is bright and lively with a high refractive index giving it excellent sparkle and scintillation. Tsavorite is …, Tsavorite is around 200 times rarer than the much better known Emerald. Gemology Tsavorite’s rarity and beautiful green color reminds one of the other green garnet called Demantoid. Demantoid, however, is a completely different variety …
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Gem in the Spotlight: Alexandrite
… known around the world as one of the most sought-after gems for the better part of 200 years. But, what makes this stone so special? Gemology of Alexandrite Alexandrite is the extremely rare, color-change variety of a gem species called … interacts with alexandrite’s crystal structure. It absorbs most wavelengths of light very well, only transmitting green and red light. This means that depending on the light source the stone will reflect more of the accent colors of light…
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What are “Blood Diamonds”?
… its zero tolerance policy towards conflict diamonds. Dedicated to eradicating the trade in conflict diamonds, it worked closely with the United Nations, governments and non-governmental organizations (NGOs) such as Global Witness and … their diamonds are from sources free of conflict. Today, 71 governments have enshrined into their national law the Kimberley Process Certification System, and now more than 99% of the world’s diamonds are from conflict free sources. …
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Gold Purity and The Differences Between White and Yellow Gold
… up to 21 karats. Most engagement rings are 14k or 18k. White gold is often used to enhance diamonds and other gemstones. White gold bridal jewelry is increasingly popular… of weight use mostly in gem weight (one carat is 1/5 gram). Karated gold used in engagement rings can be from 100% gold to as low as 37% gold. Gold’s karat grade is used to express the proportion of gold in an alloy or the quality of a…in other karat grades are listed in the table below: Karat Parts Gold to Alloy Percentage Fineness 9K 9/24 37.5% 375 10K 10/24 41.67% 417 14K 14/24 58.33% 583 18K 18/24 75.00% 750 22K 22/24 91.66% 917 24K 24/24 100% 999 The key to …
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Gem in the Spotlight: Aquamarine
… to banishing fears and phobias. Aquamarine is a universal symbol of youth, hope, and health. In ancient times, the stone was said to aid seafarers. Sailors often wore amulets of aquamarine to give them courage and tame the ocean waves. …friends.” Another saying is, “to wear aquamarine earrings brings love and affection.” Aquamarine as a precious stone has always been popular. In ancient times, the aquamarine was believed to instill courage in those who wore them. Ancient…
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Gem in the Spotlight: Tourmaline
…: is red, pinkish red, orangy red, or pink tourmaline. Indicolite: is dark blue, dark violetish blue, or dark greenish blue tourmaline. Paraíba: is a copper colored blue, intense violetish blue, or greenish blue tourmaline from Paraíba, …chrome tourmaline’s color actually comes from vanadium. Watermelon: This variant of tourmaline has a pink center and green edges that resembles a watermelon. Crystals of this type are often cut in slices to display this unique property. …
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Gem in the Spotlight: Tanzanite
Beauty and rarity are two wonderful traits in a gemstone. Tanzanite has them both. In fact, it is estimated that Tanzanite is 1,000 times rarer than diamond. But, what makes… majority (current estimates are around 95%) of tanzanite is heat treated to help bring out the vibrant blues. The stones that haven’t been heated by humans were heated through natural effects while they were still underground. Without … isn’t heated and is still pretty enough for jewelry displays trichroism. Trichroism is an effect that causes gemstones to display different colors when viewed at different angles. Tanzanite in its raw form has three colors: blue, purple, …
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Gem in the Spotlight: Emerald
Springtime exudes life, full of bright colors and renewed energy. Emerald, May’s gemstone, captures this enthusiasm for life in rich elegance. This precious gemstone has been revered for over 4,000 years … are a member of the beryl mineral family (along with morganite and aquamarine) and are valued for their rich green color. The intensity of an emerald’s hue depends on the presence of chromium and vanadium in the crystal structure. Emerald… quartz varieties. The refractive index of emerald ranges from 1.57 to 1.58, making it a moderately refractive gemstone. Its specific gravity ranges from 2.65 to 2.75. One of the distinctive features of emeralds is that they often contain …
