On our wish list for a sample.
The following is excerpted from: [Source: http://www.mgs.md.gov/geology ]
This stone is a white, crystalline, metalimestone, most famous for its use in the Washington Monument in Washington, D.C. The first 152 feet of the monument, built between 1845 and 1854, were faced with Cockeysville stone from a quarry near Texas, about 12 miles north of Baltimore. When funds were depleted, work ceased for 25 years and was resumed again in 1879 using a marble from Lee, Massachusetts. Four courses of this stone were used; however, it proved too costly and the remainder of the structure was faced with marble from a quarry in the Cockeysville area. The marble was also used in the construction of the Washington Monument in Baltimore City. By the 1840's-1850's, the marble was very popular and readily available for use in building the stone front steps of many of the older row houses in Baltimore. The Beaver Dam quarry at Cockeysville furnished marble used for the 108 columns in the wings of the National Capitol at Washington, D.C. Today, quarries work the Cockeysville Marble primarily for crushed stone and high-purity calcite.
See also: [Source: http://mrdata.usgs.gov/geology/state ]