Gem

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 rocks which covers nearly 90% of Sri Lanka, have been classified into three major lithological units, which are Highland / Southwestern Complex, Vijayan Complex and Wanni Complex

During early times Sri Lanka was once quite fittingly referred to as “Rathna-dweepa” which connotes the meaning “The Island of Gemstones”. The name Rathna-dveepa is found in many chronicles. A Merchants Guide “Periplus of the Erythrean Sea” presumed to have been complied during the first century.