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Fine Jewelry University Articles matching: “Greenish stone”
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Fine Jewelry University (Show All FJU Articles)
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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 … 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 … are referred to as jardin (the French word for garden) because they look like moss or a garden inside of the stone. These inclusions are tiny fissures, bubbles, or crystals that are visible to the naked eye. These inclusions are not …
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Diamond Buying Guide: The 4 C’s
…in comparison to each other. Cut The Cut of a diamond has two main components. First, cut refers to the shape of the stone. Round, marquise, pear, oval, square, princess all describe the shape of the diamond. Checkout the picture above to …diamond is cut to quality proportions (regardless of its shape) the maximum light is returned through the top of the stone giving a great light show. Cuts that are too shallow or too deep allow light to escape resulting in loss of …
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Gem in the Spotlight: Spinel
…For years spinel has been confused with other gems and even today is often used as a substitute for similar looking stones. In recent years, spinel has started to move out of the shadows and be appreciated in its own right, and we can see … more popular gems. For only the 3rd time in the last one hundred years, the industry is modifying the official birthstone list. Spinel will be joining peridot as the August birthstone! This change was officially made in 2016, but only in …
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Frequently Asked Question about Jewelry
… the Diamond does not chip or is not otherwise altered. An appraisal can be performed on a loose Diamond, a mounted stone, or jewelry. If the stone is not loose, the physical properties are estimated using various estimation techniques. …. Carat is the weight of a gem. A carat equals 1/5 of one gram. Cut has two components to it. The shape of the stone and the way facets are positioned on the diamond. Color is actually looking for the absence of color or transparency. …
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Gem in the Spotlight: Topaz
…, to violet, to green. These coatings can allow topaz to be any color of your preference. Topaz itself is a hard gemstone with a Mohs hardness of 8. Mohs hardness is a standardized metric of how difficult it is to scratch something. For …a single sharp blow, a trait it shares with diamond. Clean with mild dish soap; use a toothbrush to scrub behind the stone where dust can collect. Never use ultrasonic or steam cleaners on topaz. Sudden changes in temperature can fracture …
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Gem in the Spotlight: Blue Zircon
Zircon may be last in the alphabet of gemstones, but it is first in sparkle. The crystal structure of zircon creates one of the liveliest displays found in any … other colored gems? Zircon has a high refractive index (1.92-2.01). The refractive index (abbreviated RI) of a gemstone is its optical property that refers to the ratio of the speed of light in a vacuum to the speed of light through a … is also of interest to geologists because it is one of the oldest minerals on earth. In the gem world, a type of stone is often given different names for each of its colors, and Zircon is no exception. Here are examples of a few of them. …
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Gem in the Spotlight: Garnet
… diversity and style. The wide world of garnets invites all to become a garnet fan. Garnet is January’s birth stone. January babies born in the midst of cold, white (valley fog) and at times stark surroundings are rewarded with one of the … lantern to navigate the Ark at night. The ancient world is full of praise for the carbuncle, the glowing red gemstone we now know as garnet. Early scientists named garnet from the Latin granatus, which means ‘seedlike’ because garnet …
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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: Opal
… the gem world, and the lore that surrounds it is almost as colorful as the gem itself. Opal is the traditional birthstone for those lucky enough to born in October, and it is found in a huge variety of colors (sometimes all within the … color, and a wide range of colors. Red carries more value and is by far the rarest color that opals can display. Stones with larger patches of color are valued higher than those that display only small pins (pinfire) or no play of color …
