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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.

  3. 18 Most Expensive Gemstones in the World - AOL

    www.aol.com/18-most-expensive-gemstones-world...

    18. Platinum. Cost: $33.02 per gram Platinum is a beautiful precious metal that is in a similar category as gold and silver. All three of these metals are frequently traded in the global markets ...

  4. World's most expensive opal literally glows in the dark - AOL

    www.aol.com/news/2015-08-13-world-s-most...

    Meet the "Virgin Rainbow" – perhaps the finest and certainly the most expensive opal on record. It literally glows in the dark. In fact, as it gets darker around the opal, the opal appears ever ...

  5. Fire of Australia opal - Wikipedia

    en.wikipedia.org/wiki/Fire_of_Australia_Opal

    The Fire of Australia opal is a 998 gram uncut opal mined by Walter Bartram in 1946 at the Eight Mile field in Coober Pedy, South Australia. [1] [2] The opal is just under 5,000 carats; roughly equivalent in size to two cricket balls. [1] Although rough-cut, it is polished on two sides. [3]

  6. Coober Pedy - Wikipedia

    en.wikipedia.org/wiki/Coober_Pedy

    It is the largest and one of the most valuable opals mined to date, consisting of 99 per cent gem opal (the other 1 per cent being soil). The Olympic Australis measures 11 inches in length, 4 + 3 ⁄ 4 inches height, 4 + 1 ⁄ 2 inches in width, and weighs 17,000 carats (3,450 g, 121.7 oz, or 7.6 lb).

  7. Olympic Australis - Wikipedia

    en.wikipedia.org/wiki/Olympic_Australis

    The Olympic Australis opal is the largest and most valuable opal yet found (as of 1961) [1] and was valued at A$2,500,000 in 1997. [2] It was found in 1956 at the 'Eight Mile' opal field near the town of Coober Pedy in South Australia. [3] The opal was found at a depth of 9.1 metres (30 ft).

  8. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    Wood opal, also known as xylopal, [52] [53] is a form of opal, [54] as well as a type of petrified wood which has developed an opalescent sheen or, more rarely, where the wood has been completely replaced by opal.

  9. 3 Things To Sell To Pay Off Holiday Credit Card Debt

    www.aol.com/finance/3-things-sell-pay-off...

    A Little Restoration Can Steer Double-Digit Prices to Triple or Beyond. ... the melt value of 18-karat gold — which varies according to the metal’s spot price — was $63.82 per gram in mid ...

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