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.
The Washington Monument, built in honor of Americaâs revolutionary hero and first president, is dedicated in Washington, D.C. The 555-foot-high marble obelisk was first proposed in 1783, and Pierre LâEnfant left room for it in his designs for the new U.S. capital.After George Washingtonâs death in 1799, plans for a memorial for the âfather of the countryâ were discussed, but none were adopted until 1832âthe centennial of Washingtonâs birth.he 555-foot-high marble obelisk was first proposed in 1783, and Pierre LâEnfant left room for it in his designs for the new U.S. capital. After George Washingtonâs death in 1799, plans for a memorial for the âfather of the countryâ were discussed, but none were adopted until 1832âthe centennial of Washingtonâs birth.