![]() ![]() For this reason, it is often associated with copper deposits as a secondary mineral. In fact, Turquoise is a hydrated phosphate of copper and aluminum and is the result of percolation of meteoric or groundwater through aluminous rock in the presence of copper. Gem grade types of turquoise are extremely difficult to find. Undeniably one of the world’s rarest and most intriguing Turquoises, Australian Turquoise’s beauty is totally natural, which is significant for a gemstone where over 90 percent is heavily enhanced. First of all, Gem quality turquoise is hard Secondly, Low grade turquoise is soft. Turquoise varies in quality from high (Gem) to low (chalk). ![]() Additionally, natural stone is porous and will absorb moisture and oils, while a stabilized stone will not. DecemExplore The Fascinating World of Various Types of Turquoise The mineral turquoise is formed when water containing copper and aluminum leaks through a rock. Natural stone, however, can change color over time. Additionally, the color is locked by the resin making it unchanging. You can tell the difference between a natural and stabilized stone because a stabilized stone is harder. Sleeping Beauty Turquoise from the mine in Globe, Arizona is very pure, natural blue turquoise without mineral content, so it does not require stabilization. Treated turquoise is less expensive than the untreated variety, which can be very expensive depending on its grade. First discovered in 1934 by Duke Goff, the Blue Gem Turquoise Mine was a very large producer of high-quality turquoise in the early days, and was owned by. Color Enhancement - Sometimes, stones are also treated with chemicals to enhance their colors.The world standard for gem (best) quality turquoise is. The stone is treated with an epoxy resin or another substance in order to fill the pores so that the stone retains its color over time. Generally accepted factors in the grading of turquoise are hardness, luster, colour, matrix, and rarity. In Nature, it occurs in the whole range of hues from sky blue to grey-green, and it is mostly found in places where there is a high concentration of copper in the soil. Stabilization - This is the main form of treatment. Turquoise is a copper aluminium phosphate with a hardness of 6, i.e.Stabilized turquoise is the most common type of turquoise found on the market today. Jewelers are actually obligated by law to disclose any and all treatments on the turquoise stones sold, so always be sure to ask if the stones in a piece that interests you have been treated. Only around 3 of all turquoise mined is considered gem grade material. Unless specified as natural, a lot of the turquoise available in jewelry stores has been treated in some way. ![]()
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