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2. Halley's Comet Opal - Wikipedia

   en.wikipedia.org/wiki/Halley's_Comet_Opal

   The Halley's Comet Opal is a very fine specimen, with few flaws or blemishes and a large green and orange 1.6 cm (0.63 in) thick color bar which goes through the opal. Formed about 20 million years ago, it is an example of a nobby, which is a natural lump-shaped opal found only at Lightning Ridge. [2] As of 2006 it was for sale at $1.2 million. [3]

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

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

   It literally glows in the dark. In fact, as it gets darker around the opal, the opal appears ever more vibrant. The stone's ... 24/7 Help. For premium support please call: 800-290-4726 more ways ...

4. Open-high-low-close chart - Wikipedia

   en.wikipedia.org/wiki/Open-high-low-close_chart

   Each vertical line on the chart shows the price range (the highest and lowest prices) over one unit of time, e.g., one day or one hour. Tick marks project from each side of the line indicating the opening price (e.g., for a daily bar chart this would be the starting price for that day) on the left, and the closing price for that time period on ...

5. 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. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

6. Opal - Wikipedia

   en.wikipedia.org/wiki/Opal

   The largest unpolished black opal in the Smithsonian Institution, known as the "Roebling opal", [46] came out of the tunneled portion of the Rainbow Ridge Mine in 1917, and weighs 2,585 carats (517.0 g; 18.24 oz). The largest polished black opal in the Smithsonian Institution comes from the Royal Peacock opal mine in the Virgin Valley, weighing ...

7. 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).

8. Candlestick chart - Wikipedia

   en.wikipedia.org/wiki/Candlestick_chart

   A candlestick chart (also called Japanese candlestick chart or K-line) is a style of financial chart used to describe price movements of a security, derivative, or currency. While similar in appearance to a bar chart, each candlestick represents four important pieces of information for that day: open and close in the thick body, and high and ...

9. Flame Queen Opal - Wikipedia

   en.wikipedia.org/wiki/Flame_Queen_Opal

   The Flame Queen Opal is perhaps the best-known example of "eye-of-opal", an eye-like effect created when opal in-fills a cavity. [ 1 ] The Flame Queen's flat central raised dome flashes red or gold depending on the angle of view, and is surrounded by a band of deep blue-green, giving the stone an appearance somewhat like that of a fried egg.