you’ll know confidentially what’s in your collection.you’re well-geo-educated on working with this powerful crystal.In today’s show we’re digging into exactly how to tell the difference between real citrine and the baked variety so: Fake Citrine | How to Tell the Difference It has a refractive index higher than sapphire and spessartite garnet, and its dispersion or fire is nearly as pronounced as that of diamond.Topic: UPDATED: Real Citrine vs. Zircon is valued especially for its brilliance and fire. Note that yellow and white zircon is almost always heat treated. These include brown, rose, rose-orange and golden orange zircon gemstones. While the popular blue zircon is heat treated, there are natural zircon gems that are not treated in any way. Untreated Orange, Brown, and Rose Zircon Gemstones It also means that its color cannot be modified by any form of treatment. This means it only occurs in shades of green. Peridot is an idiochromatic gem, meaning that its color is derived from its basic chemical composition, not from trace impurities. In addition to its vitreous luster and excellent clarity, tourmaline can often be found in large sizes at affordable prices. Tourmaline provides the greatest selection of colors in any untreated gemstone. Due to its rarity, tsavorite is difficult to find in large sizes. Yet, tsavorite has better clarity and durability than emerald, and it is never treated. With the good hardness, brilliance and clarity of garnet, this is a red gem suitable for all kinds of jewelry.Ĭolored by chromium and/or vanadium, fine examples of tsavorite rival emerald for intensity of green. With a hardness of 7 to 7.5 on the Mohs scale, spessartite is hard enough for rings.Ī mixture of pyrope and almandite garnet, rhodolite is a rose-red to purple-red garnet with none of the brownish tones associated with pyrope garnet. Spessartite has a higher refractive index than sapphire, so it has superb brilliance. Spessartite's mandarin orange and orange-red colors are unique in the gemstone world. Additionally, a wide range of colors are available, including red, orange, violet, blue, pink, green and silver. Spinel has often been confused with fine ruby and sapphire. It has excellent gemstone characteristics, such as a hardness of 8 on the Mohs scale, and excellent clarity and dispersion (fire). Many gem dealers consider spinel to be the finest untreated gem variety available today. Here are our recommendations for untreated gem varieties: These can be bought with confidence, knowing that they are completely natural gems. There are a number of gemstone varieties that combine good gemstone characteristics - hardness, durability, brilliance and clarity - with outstanding color, yet are never treated. However, there is no need to pay a fortune for very rare untreated sapphires or rubies. Some of those ancient techniques were undoubtedly deceptive, but nowadays, gem treatments are just a way for the industry to meet the global demand for gemstones in the face of very limited supply.ĭespite the proliferation of gem treatments, there are still many choices for buyers who insist on an untreated gem. Pliny's Natural History, the compendium of knowledge from ancient Rome written in the first century A.D., discusses a range of techniques for altering gems, including heating, oiling, dyeing and the use of foil backings and coatings.
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