We plan to accomplish our mission through biological and cultural programs and displays, green building design, citizen-science and other research, international exchange of information, the World Owl Hall of Fame, the International Festival of Owls, and other means.
Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminium garnet with the formula Ca 3 Al 2 Si 3 O 12.are in gem-quality over several carats (1 carat = 200 mg) in weight, tsavorite has been found in larger sizes. In late 2006 a 925-carat (185.0 g) crystal was discovered. It yielded an oval mixed-cut 325 carat (65 g) stone, one of the largest, if not the largest faceted tsavorites in the world.
Yellow Fluorite. Fluorite, also called fluorspar, is a fluorescent (a word derived from its name) stone that comes in a range of colors, including red, green, blue, black and yellow. The yellow gemstones are common enough, but are rather soft, and hence not widely used in jewelry.eside black, red, green and almost all other colors, tourmaline is also available as yellow stones, though the yellow gems are very rare. The yellow gemstones come from the species of tourmaline called dravite, as well as the more valuable elbaite. The yellow rocks are mined in Brazil and Africa.