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Benitoite (/ b ə ˈ n iː t oʊ aɪ t /) is a rare blue barium titanium cyclosilicate mineral, found in hydrothermally altered serpentinite. It forms in low temperature, high pressure environments typical of subduction zones at convergent plate boundaries. Benitoite fluoresces under short wave ultraviolet light, appearing bright blue to bluish ...
Ekanite is an uncommon silicate mineral with chemical formula Ca 2 ThSi 8 O 20 or (Ca,Fe,Pb) 2 (Th,U)Si 8 O 20. It is a member of the steacyite group. It is among the few gemstones that are naturally radioactive. Most ekanite is mined in Sri Lanka, although deposits also occur in Russia and North America.
Pabstite is a barium tin titanium silicate mineral that is found in contact metamorphosed limestone. It belongs to the benitoite group of minerals. The chemical formula of pabstite is Ba(Sn,Ti)Si 3 O 9. It is found in Santa Cruz, California. The crystal system of the mineral is hexagonal.
The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale. A rock may consist of one type of mineral or may be an aggregate of two or more different types of minerals, spacially segregated into distinct phases.
Sri Lanka, geologically speaking is an extremely old country. Ninety percent of the rocks of the island are of Precambrian age, 560 million to 2,400 million years ago. The gems form in sedimentary residual gem deposits, eluvial deposits, metamorphic deposits, skarn and calcium-rich rocks. Nearly all the gem formations in Sri Lanka are located ...
Lankem Ceylon PLC is a chemicals, paints and consumer goods manufacturing company in Sri Lanka. The company also engaged in the hospitality industry by owning and operating resorts in Sri Lanka. The company is incorporated in 1964 by Royal Dutch Shell and listed on the Colombo Stock Exchange in 1970.
Sinhalite is a borate mineral with formula MgAl(BO 4). [2] Sinhalite was first found in Sri Lanka (Ceylon) in 1952, and was named from Sinhala - the Sanskrit name for Sri Lanka. [3] Gemstone quality Sinhalite can also be found in Madagascar, Tanzania and Myanmar (Burma).
Serendibite is an extremely rare silicate mineral that was first discovered in 1902 in Sri Lanka by Dunil Palitha Gunasekera and named after Serendib, the old Arabic name for Sri Lanka. The mineral is found in skarns associated with boron metasomatism of carbonate rocks where intruded by granite .