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Fine Jewelry University Articles matching: “Square double halo”
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Fine Jewelry University (Show All FJU Articles)
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Anatomy of a Ring
… sets the stone in between two straight pieces of metal on either side of it (this style is most commonly seen with square or princess cut diamonds). As you may have guessed, all styles of head can wear thin over time and may need to be … shopping for a halo engagement ring, first look for the overall shape of halo that you like (e.g. round, cushion, square, something else), and then consider how the accent stones in the halo are set. Are they secure? Will the halo help …
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The History of Diamond Cuts
… from the “standard” facet pattern is. The next important diamond cut is the French cut. The French cut is a square or rectangular cut diamond. It appears square when viewed from above because it is based off the octahedral shape of the … diamond. The French cut has just 9 crown facets, with the square or rhombus-shaped table facet diagonal to the square of the crown. At the four sides of the table are four triangle facets that point towards the corners of the crown. This …
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Gem in the Spotlight: Garnet
… garnet was the prescription for jaundice. Legend holds garnets guard travelers against perils during the journey. The traveler is also protected against diseases and preserves their honor and health. All these powers were said to double for people born in January. The dark red garnet has long been associated with blood. Christian tradition considered the blood-red garnet symbolic of Jesus Christ’s sacrifice. Legend tells that garnet lights up the night. Noah used a …
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The Magic of Polarized Light
… two images of the facet junction appear. This is because the stone has a high birefringence (i.e. a high amount of double refraction). When you hold a polarizing filter over the stone one of the images disappears; as you rotate the …angle to pass through at a time. This helps confirm that a stone is doubly refractive and not just cut with unusual, doubled facet junctions. The Elegance of the Polariscope Another gemological tool that uses polarized light is the …
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Diamond Buying Guide: The 4 C’s
… want. The photo above shows some common diamond carat weights and how they look 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 see examples of the most popular diamond shapes. There are many more shapes than we can list here and there are even variations on the common shapes with …
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What Are Lab Grown Diamonds?
… the most popular diamond testers use heat dispersion to test if a gemstone is a diamond. However, Moissanite has a completely different chemical structure than diamond and different optical properties. For example, Moissanite is double-refractive whereas diamond is single-refractive. Since Moissanite tests like diamond (due to its heat dispersal properties), people think it is diamond or synthetic diamond. However, since it does not have the same crystal structure or …
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How Are Lab Grown Diamonds Made?
… and temperature to grow the diamond. The 10.02ct HPHT Diamond Made by NDT. Thanks to IGI for sharing this video. The GE invention of the belt press uses an upper and lower anvil to generate pressure over 1.5 million pounds per square inch and temperature above 2,000 degrees Celsius. In this environment, the pure carbon melts and begins to form into a diamond around the starter seed. On December 16, 1954, a belt press was used to create the first reproducible lab grown …
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Learn Secret Diamond Buying Skills From a Professional Diamond Buyer
… it to your understanding. It is their job to give you clear information to compare. The cut “C” of the 4 C’s has two components. The first component is simple. The cut can refer to the shape of the stone. Round, Marquee, Pear, Oval, Square, and Princess all describe the shape of the gem. Round diamonds are by far the most popular cut in diamonds under three carat. The diamond’s shape should be one of the earliest decisions you make. It will determine the style of ring …
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Gem in the Spotlight: Quartz
… and is one of the largest clusters ever found. Herkimer diamonds are a famous type of quartz not for their rarity, but for their ability to pass for diamonds to the untrained eye. Of course, they are actually not diamonds at all but double-terminated quartz crystals found in Herkimer County in New York. They are known for their exceptional clarity and often exhibit a naturally faceted appearance. They were discovered in the 1800’s while workers were mining in the Mohawk …
