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Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
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“From monetary to spiritual worth, the value of gemstones is vast, varied, and lasting,” she says. Before buying any old gem, though, keep reading to uncover the 25 most popular gemstones ...
Found all over the world, the industry of coloured gemstones (i.e. anything other than diamonds) is currently estimated at US$1.55 billion as of 2023 and is projected to steadily increase to a value of $4.46 billion by 2033.
Over the years, Towle has created numerous sterling silver flatware patterns in the United States: including the "Candlelight" in 1934, the "Marie Louise" in 1939, which became the official sterling silver pattern for U.S. embassies worldwide, "Old Master" in 1942, now considered by some to be the company's flagship pattern, and the "Contour ...
In fact, one fine jewelry collector says the "Demantoid is among the most expensive of all garnets" with some of the better pieces worth as much as $10,000 per carat.
Turquoise (/ ˈ t ɜːr k (w) ɔɪ z / TUR-k(w)oyz) is a cyan color, based on the mineral of the same name.The word turquoise dates to the 17th century and is derived from the French turquois, meaning 'Turkish', because the mineral was first brought to Europe through Turkey from mines in the historical Khorasan province of Iran (Persia) and Afghanistan today.
Turquoise is an equities trading platform (multilateral trading facility or MTF), created by nine major investment banks in 2008. The aim was to provide dealing services at a 50% discount to traditional exchanges . [ 1 ]