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  2. Main Avenue Historic District (Durango, Colorado) - Wikipedia

    en.wikipedia.org/wiki/Main_Avenue_Historic...

    Main Avenue Historic District in Durango, Colorado is a 34-acre (14 ha) historic district that was listed on the National Register of Historic Places in 1980.. According to its 1980 NRHP nomination, it was deemed significant "because it represents the essence and core of both the evolution and development of business and commerce in the most important town in southwestern Colorado."

  3. 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

  4. 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.

  5. The 10 best places to buy jewelry online in 2024 - AOL

    www.aol.com/lifestyle/best-places-to-buy-jewelry...

    Best for fine jewelry: James Allen. Best for affordable jewelry: Baublebar. Best for trendy jewelry: Mejuri. Best for sustainable jewelry: GLDN. Best for 14k gold jewelry: Catbird. Best for ...

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

    www.aol.com/sell-gold-jewelry-price-nears...

    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 ...

  7. List of lost mines - Wikipedia

    en.wikipedia.org/wiki/List_of_Lost_mines

    Usually the mines are said to contain valuable elements or minerals such as gold, silver or diamonds. Often there is a map or other document allegedly detailing the history or location of the mine. Common to all the lost mine legends is the idea of a valuable and mysterious resource being lost to history.

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

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

    In fact, as it gets darker around the opal, the opal appears ever more vibrant. The stone's. ... Unearthed by a lone miner working an old mineshaft with an excavator in 2003, the virgin rainbow is ...

  9. The Durango smelter - Wikipedia

    en.wikipedia.org/wiki/The_Durango_smelter

    1968 view of the Durango Smelter site taken across the Animas River from the D&RGW Railroad yard (Now the site of US Highway 160/550) The San Juan and New York Smelting Company, (later on merged into the American Smelting & Refining Company, but commonly referred to as the "Durango Smelter") was a mineral smelter located below Smelter Mountain right in front of Durango, Colorado, operating ...

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