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.
Whenever I take a look at the Washington Monument, I always think to myself about the story of the monument. The Washington Monument DC structure is an obelisk that stands approximately 555 feet that was made to commemorate General George Washington, the first US President, and his commitment to the United States.he Washington Monument is the symbol of all the 50 states in America and stands for all the states in America that went through numerous struggles at first and turned out to be triumphant at the finish.