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Sri Lanka lies at the southern tip of India which is located at latitude of 6° – 10° N and longitude of 80° – 82° E. The major part of Sri Lanka is made up of Precambrian crystalline rocks except for a belt of sedimentary rocks along the north-west coast of the country. The Precambrian […]

Emerald, grass-green variety of beryl (q.v.) that is highly valued as a gemstone. The name comes indirectly from the Greek smaragdos, a name that seems to have been given to a number of stones having little in common except a green colour; Pliny’s smaragdus undoubtedly included several distinct species. Much confusion has arisen with respect […]