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2. List of individual gemstones - Wikipedia

   en.wikipedia.org/wiki/List_of_individual_gemstones

   Samarian Spinel, the world's largest spinel; Menshikov Ruby, the world's second largest spinel set on top of the Great Imperial Crown of Russia; Timur Ruby, believed to be a ruby until 1851, hence its name; Black Prince's Ruby, the famous spinel mounted on the Imperial State Crown of the United Kingdom

3. List of gemstones by species - Wikipedia

   en.wikipedia.org/wiki/List_of_gemstones_by_species

   This is a list of gemstones, organized by species and types. Minerals ... Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538;

4. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Found all over the world, the industry of coloured gemstones (i.e. anything other than diamonds) is currently estimated at US$1.55 billion as of 2023 and is projected to steadily increase to a value of US$4.46 billion by 2033. [8] A gem expert is a gemologist, a gem maker is called a lapidarist or gemcutter; a diamond cutter is called a ...

5. 18 Most Expensive Gemstones in the World - AOL

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

   5. Red Diamonds. Cost: $5 million per gram Red diamonds are the rarest version of colored diamonds in the world, with no specimens at all being presented to the Gemological Institute of America ...

6. One of the ‘purest, pinkest diamonds’ to go under the hammer

   www.aol.com/one-purest-pinkest-diamonds-under...

   The last time a gem of this colour, quality and size was shown to the world was in 2017 and it went on to become the most expensive gemstone ever to be sold at auction (Yui Mok/PA)

7. List of emeralds by size - Wikipedia

   en.wikipedia.org/wiki/List_of_emeralds_by_size

   Zambia is the world's second biggest producer, with Kagem mine being the world's largest emerald mine [11] responsible for 25–30% of the world's production of gem-quality stones. [12] In 2019 Kagem emerald mine produced 42.4 million carats of emeralds. [13] The Zambian emerald sector is an important contributor of tax revenue to the Government.