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Vibrant and sparkling, gemstones add colour and brilliance to any jewellery wardrobe. Gemstones are found and appreciated nearly everywhere around the world, and the perfect gemstone has the ability to perfectly express one's personal style.
Simply put, a gemstone is the naturally occurring form of mineral used for personal adornment. Throughout the ages, gemstones have represented wealth and power. Today, gemstones are an affordable way to shine.
The impression that some gemstones are precious and others are only semi-precious is familiar to those who purchase coloured stones. "Precious" stones were considered the big four - diamond, ruby, sapphire and emerald. These gemstones traditionally commanded higher prices due to their extraordinary colour, brilliance and extreme rarity. All other gemstones were considered "Semi-Precious", as they were thought to be less commercially valuable. Today, however, this distinction is considered insignificant due to the range of quality, availability, size and cost of gemstones in today's marketplace.
Genuine gemstones are those mineral varieties found or mined in natural settings. Like diamonds, natural gemstones contain impurities and imperfections that can diminish overall appearance and value.
Lab-created synthetic gemstones usually feature the same molecular composition to their naturally occurring mineral counterparts, but they are grown in a controlled laboratory environment. They are chemically, physically, and optically identical to gems found in nature, and there's really no way to tell them apart. Lab-created gemstones feature the same to better brilliance as a natural gemstone, however, the laboratory cultivation process leads to less impurities and fewer imperfections. Lab-created gemstones don't have the rarity of natural gemstones, which makes them more affordable.
Simulated gemstones are look-alike substitutes for genuine gemstones. Because simulated stones are imitation and not made from the same minerals, they cost less and usually have no flaws, but they may not behave in the same way as their natural counterparts with respect to brilliance, sparkle, hardness or longevity.
Zales uses both genuine and high-quality lab-created gemstones in its gemstone jewellery selections. All lab-created or simulated gemstones are clearly indicated in the product descriptions, so as to not deceive the consumer.
|Mohs Scale of Mineral Hardness|
|Mohs Rating||Mineral||Scratch Test Results||Jewellery Use|
|1||Talc||Very soft; used in talcum powder.||No|
|2||Gypsum||Very easily scratched; used in plaster.||No|
|3||Calcite||A copper penny will scratch it.||No|
|4||Flourite||A steel file will scratch it.||Yes|
|5||Apatite||A steel file will scratch it if pressed hard.||Yes|
|6||Feldspar||Will scratch a steel file.||Yes|
|7||Quartz||Will scratch a glass plate and all previous.||Yes|
|8||Topaz||Will scratch unglazed porcelain and all previous.||Yes|
|9||Corundum||Will scratch all but diamond.||Yes|
|10||Diamond||Will scratch everything.||Yes|
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Like diamonds, gemstones are graded according to specific factors.
COLOUR - Colour is also known as hue. The colour of the gemstone affects its value and how it shows in the jewellery. Generally clear, medium-tone, intense and saturated colours are the most preferred. Avoid stones with colour that is too dark or muddled. The brighter and more vivid the colour, the better.
CLARITY - Clarity is the appearance of inclusions or imperfections in the gem. After colour, gemstone clarity is the next most important factor. Clear, transparent gemstones with no visible flaws (inclusions) are the most valued. Clarity can be difficult to judge, but if flaws aren't visible in the face-up position, then they rarely matter. Some gemstone varieties, such as emerald and red tourmaline, are rarely seen without inclusions. It is important to consider clarity within the gemstone variety, and not against other gemstones.
CARAT - Gemstones are sold by weight, not by size, and, like diamonds, prices are calculated per carat. It's important to recognize that some gems, like rubies, are denser than others, like emeralds, so similarly sized stones of different varieties may differ greatly in cost. In addition, larger stones of some varieties can be quite rare and much more expensive - such as ruby, emerald, sapphire and tourmaline.
CUT - Cut is an important factor in determining a stone's beauty and perceived value when it is set in gemstone jewellery. A good cut is something that may not cost more but can add or subtract substantial beauty. A well-cut faceted gemstone evenly reflects light back across its surface area when held face up. Many different cut shapes are available, and it's important to consider cut in relation to the jewellery style you're considering. The best way to judge cut is to look at similar gemstones next to each other.
The very best way to keep your gemstone jewellery clean is to bring it in to your local Zales Jewelers store any time for a free cleaning and inspection. We're happy to keep your jewellery bright and shiny, and our expert Jewellery Consultants understand the best cleaning method for your jewellery. However, should you choose to clean your jewellery yourself, here are a few things to keep in mind: