Search results
Results from the WOW.Com Content Network
The Gemological Institute of America (GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [ 1 ] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
On June 28, 1940, Liddicoat joined the staff of GIA as an Assistant Director of Education. About a year later, in fall 1941, Liddicoat helped develop the Diamolite, and also published, alongside Robert M. Shipley, his first article for Gems & Gemology; "A Solution to Diamond Color Grading Problems".
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 ...
Black star sapphire is found in Thailand, Cambodia, Tanzania, Australia, Sri Lanka, Sierra Leone, Laos and many other countries, although supply is growing continuously exhausted, and mine yields have decreased. [2] The mines on the Thai/Cambodia border were reported to be almost exhausted of clear high-value gems by the late 1990s.
Peridot (/ ˈ p ɛ r ɪ ˌ d ɒ t,-ˌ d oʊ / PERR-ih-dot, -doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine.Peridot is one of the few gemstones that occur in only one color.
Sri Lanka 392.52 carats Cushion Blue Anonymous owner Logan Sapphire [82] Sri Lanka 422.99 carats Cushion Blue National Museum of Natural History, Washington Queen Marie of Romania [83] Sri Lanka 478.68 carats Cushion Blue Anonymous owner Star of Adam [17] Sri Lanka, 2015 1404.49 carats Star Blue Anonymous owner Star of Bombay: Sri Lanka 182 ...
This page was last edited on 31 December 2018, at 21:34 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Sri Lanka Air Force: 117 Disaster Management Call Centre Disaster Management Centre [2] 118 National Help Desk Ministry of Public Security: 119 Police Emergency Service Sri Lanka Police Department: 1990 Emergency Pre–Hospital Care Ambulance Service Ministry of Health