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.
About the Statue of Liberty. What materials make up the Statue of Liberty? The Statue of Liberty is made of copper 3/32in. (about 2.5mm) thick, the same as two American pennies placed together. The internal structure is comprised of cast iron and stainless steel. Why is the Statue green? The Statue's copper has naturally oxidized to form the outer patina, or green, coating. Upon completion in 1886, the Statue of Liberty was more of a traditional brown color, like an American penny. It took about thirty years for the Statue of Liberty to fully oxidize and form the patina.