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2. Colombian emeralds - Wikipedia

   en.wikipedia.org/wiki/Colombian_emeralds

   The source of these trace elements in the case of Colombian Emeralds is believed to be from interaction of the parent hydrothermal fluid and the black shale host rock. [citation needed] Colombian emeralds are much sought after, and not just because of their superb quality and color. A gem's value depends upon its size, purity, color and brilliance.

3. Gachalá Emerald - Wikipedia

   en.wikipedia.org/wiki/Gachalá_Emerald

   Gachalá municipality in the Department of de Cundinamarca, Colombia. The Gachalá Emerald, one of the most valuable and famous emeralds in the world, was found in 1967, in the mine called Vega de San Juan, located in Gachala, a town in Colombia, located 142 km (88 mi) from Bogota. Gachalá Chibcha means "place of Gacha."

4. Ronald Ringsrud - Wikipedia

   en.wikipedia.org/wiki/Ronald_Ringsrud

   Ringsrud has a background in emerald gemology and the world emerald market. He has given presentations and lectures on the topic since 1986. [2] As the owner of Ronald Ringsrud Company, he was the host and guide in Bogotá, Colombia, for foreign buyers visiting the city's emerald marketplace, as well as guiding groups from the L.A. County Museum of Natural History and the Gemological Institute ...

5. List of most expensive watches sold at auction - Wikipedia

   en.wikipedia.org/wiki/List_of_most_expensive...

   Finally, any auctioned watch without public online records from auctioneers (e.g. major auction houses) will not be included in the ranking. As of December 2022, the most expensive watch (and wristwatch) ever sold at auction is the Patek Philippe Grandmaster Chime Ref. 6300A-010, fetching US$31.19 million (31,000,000 CHF) in Geneva on 9 ...

6. Category:Colombian emeralds - Wikipedia

   en.wikipedia.org/wiki/Category:Colombian_emeralds

   This category contains articles about Colombian emeralds. Colombia is the number one producer of emeralds in the world. Subcategories.

7. Mineral industry of Colombia - Wikipedia

   en.wikipedia.org/wiki/Mineral_industry_of_Colombia

   Colombia is the main producer of finer quality emeralds worldwide. Colombia produced 2.7 Mcarats (540 kg) of emeralds during 2008. [15] Emerald mines are located both in the Boyacá and Cundinamarca Departments. Colombian emeralds constitute 50-95% of the world production, the numbers depending on the year, source and emeralds grade. [25] [26] [27]