Featured News. Greens Sand has been in the silica sand industry since 1979 and has been a distributor of specialised silica sand to the Industrial as well as Leisure market for over 30 years, distributing nationally and across borders. We store a wide range of grades of silica sands.
Standing almost due east of the Reflecting Pool and the Lincoln Memorial, the monument, made of marble, granite, and bluestone gneiss, is both the world's tallest stone structure and the world's tallest obelisk, standing 555 feet 7 11â32 inches (169.351 m) tall.t the time of its completion, it was the tallest building in the world, a title it retained until the Eiffel Tower was completed in 1889; however, the Washington Monument is still the tallest stone structure in the world.
1 The Liberty Bell is composed of approximately 70 percent copper, 25 percent tin and traces of lead, zinc, arsenic, gold and silver. 2  The Bell is suspended from what is believed to be its original yoke, made of American elm. This spelling was one of several acceptable spellings of the name at that time. 2  The strike note of the Bell is E-flat. 3  The federal government gave every state and its territories a replica of the Liberty Bell in the 1950s as part of a national U.S. Savings Bond campaign.