The term precious used to refer to the big four gemstones - diamonds, rubies, sapphires, and emeralds. These gemstones commanded higher prices due to their extraordinary color, brilliance, and rarity. All other gemstones were considered semi-precious - less rare and less valuable.
Today, however, this distinction applies less and less. The range of quality, availability, size, and cost of every type of gemstone means all types are in higher demand than ever. Natural, Lab-Created, and Simulated Gemstones. Genuine gemstones are mineral varieties found or mined from natural settings.Like diamonds, natural gemstones contain impurities and imperfections that can impact overall appearance and value. Lab-created gemstones feature the same molecular composition as their naturally occurring counterparts, but are grown in a lab. They usually have fewer imperfections, but are not as rare as natural gemstones, so they are more affordable. They imitate gemstones, but are not made from the same minerals.
They cost less and can differ from natural gemstones in brilliance, sparkle, hardness, and longevity. Mohs Scale of Mineral Hardness. Created by German geologist Friedrich Mohs, this scale measures the ability of a harder mineral to scratch a softer mineral. For example, a diamond (hardness = 10) will scratch garnet (hardness = 6.5 - 7.5), but not the other way around.
Therefore, a diamond is harder than a garnet. It's important to know the hardness of the gemstones you wear - harder stones are better for jewelry you'll wear often. Very soft; used in talcum powder. Very easily scratched; used in plaster.
A copper penny will scratch it. A steel file will scratch it. A steel file will scratch it if pressed hard. Will scratch a steel file.Will scratch a glass plate and all previous. Will scratch unglazed porcelain and all previous. Will scratch all but diamond. Gemstone Carat, Clarity, Color and Cut. Some gemstones are denser than others, so similarly sized stones can differ greatly in cost. Also, larger stones of some varieties can be quite rare and much more expensive - like rubies, sapphires, and tourmaline. After color, gemstone clarity is the next most important factor. Transparent gemstones with no visible flaws (inclusions) are the most valuable.
Some gemstones, such as emeralds and red tourmaline, are rarely seen without inclusions - that's why it's important to consider clarity within the gemstone variety, and not against other gemstones. The color of the gemstone impacts its value and how it shows in your jewelry. The brighter and more vivid the color, the better. Avoid stones with color that is too dark or muddled. The cut of a gemstone is critical to its overall beauty.
A well-cut gemstone will reflect light evenly across its surface when held face up. It's important to consider the cut in relation to the jewelry style you're considering. The best way to judge cut is to look at similar gemstones next to each other. If you'd like to clean your jewelry yourself, here are a few things to keep in mind.Use a jewelry polishing cloth to gently wipe over the areas that need a polish. If you don't have a polishing cloth, any cotton or microfiber fabric will work. Do not use facial tissue or paper towels, as the fibers in paper can scratch your gemstone. For best results, use a non-detergent soap and warm water to clean your jewelry. If you clean your jewelry in a sink, cover the drain hole with a washcloth - trust us on this one!
This item is in the category "Jewelry & Watches\Fine Jewelry\Necklaces & Pendants".diamonds" and is located in this country: US. This item can be shipped worldwide.