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  2. Your Ring Could Be Worth Thousands: How To Spot Valuable ...

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    Solid goldwhite gold not included — and platinum jewelry should remain the same color, even when it’s worn down. Another tell that can be used on gold jewelry , is green specks.

  3. How to Identify Antique and Vintage Jewelry That Will Only ...

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    When it comes to antique and vintage jewelry, these are the best brands, timeless designs, and most sought-after stones to look for, according to an expert.

  4. List of individual gemstones - Wikipedia

    en.wikipedia.org/wiki/List_of_individual_gemstones

    Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal; Flame Queen Opal; Galaxy Opal; Halley's Comet Opal, the world's largest uncut black opal; Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    The irradiation process is widely practiced in jewelry industry [45] and enabled the creation of gemstone colors that do not exist or are extremely rare in nature. [46] However, particularly when done in a nuclear reactor , the processes can make gemstones radioactive.

  6. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    Jewelry applications of precious opal can be somewhat limited by opal's sensitivity to heat due primarily to its relatively high water content and predisposition to scratching. [11] Combined with modern techniques of polishing, a doublet opal can produce a similar effect to Natural black or boulder opal at a fraction of the price.

  7. The Harpole Treasure includes one of the most valuable pieces ...

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    The Harpole Treasure was discovered in 2022, and refers to a collection of valuable relics unearthed from a burial ground in England. Among the finds was a unique piece of jewelry.

  8. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    Like yellow gold, the purity of white gold is given in karats. White gold's properties vary depending on the metals used and their proportions. A common white gold formulation consists of 90% wt. gold and 10% wt. nickel. [3] Copper can be added to increase malleability. [2] The alloys used in the jewelry industry are gold-palladium-silver and ...

  9. How to Sell Gold Jewelry When Prices Hit Historic High

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    Aim to get 90 to 95% of the spot price when selling gold bars or coins, and 70 to 80% of melt value for jewelry and other items. A karat is a unit of measure for the fineness of gold. For example ...

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