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2. List of sapphires by size - Wikipedia

   en.wikipedia.org/wiki/List_of_sapphires_by_size

   Sri Lanka 478.68 carats (95.736 g) Cushion Blue Anonymous owner [6] Logan Sapphire: Sri Lanka 422.99 carats (84.598 g) Cushion Blue National Museum of Natural History, Washington [7] Star of Asia: Burma 330 carats (66 g) Star Blue National Museum of Natural History, Washington [8] Star of Artaban: Sri Lanka 287 carats (57.4 g) Star Blue-violet

3. Geuda - Wikipedia

   en.wikipedia.org/wiki/Geuda

   Geuda (ගෙවුඩ, pronounced gay-yoo-dah [needs IPA]) is a form of the mineral corundum, or sapphire, found primarily in Sri Lanka. Around 70%-80% of gems mined in Sri Lanka belong to geuda varieties. Because of its semitransparent and milky appearance due to rutile inclusions, these stones have little value as gemstones in their natural ...

4. Sapphire - Wikipedia

   en.wikipedia.org/wiki/Sapphire

   For sapphire, Jammu and Kashmir receives the highest premium, although Burma, Sri Lanka, and Madagascar also produce large quantities of fine quality gems. [3] The cost of natural sapphires varies depending on their color, clarity, size, cut, and overall quality. Sapphires that are completely untreated are worth far more than those that have ...

5. Gems of Sri Lanka - Wikipedia

   en.wikipedia.org/wiki/Gems_of_Sri_Lanka

   Sri Lanka was affectionately known as Ratna-Dweepa which means Gem Island. The name is a reflection of its natural wealth. Marco Polo wrote that the island had the best sapphires, topazes, amethysts, and other gems in the world. [1] Ptolemy, the 2nd century astronomer recorded that beryl and sapphire were

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Even the same named gemstone can occur in many different colors: sapphires show different shades of blue and pink and "fancy sapphires" exhibit a whole range of other colors from yellow to orange-pink, the latter called "padparadscha sapphire". [39] This difference in color is based on the atomic structure of the stone.

7. Ratnapura - Wikipedia

   en.wikipedia.org/wiki/Ratnapura

   It is the capital city of Sabaragamuwa Province, as well as the Ratnapura District, and is a traditional centre for the Sri Lankan gem trade. It is located on the Kalu Ganga (Black River) in south-central Sri Lanka, some 101 km (63 mi) southeast of the country's capital, Colombo. Ratnapura is also spelled as Rathnapura.