silicia

Hydraulic limestones, sometimes referred to as argillaceous limestones have a high proportion of clay and silicia (15-20 %) and can be either high calcium or magnesian.

1. General Information 1985

But she left him at the big brick doorway of the Library now, and by the time the fogs had risen from Main Street, she was tied into her silicia apron and happily absorbed in her work.

Martie, the Unconquered Kathleen Thompson Norris 1923

Cork grasp, reel seat above the hand; standing guides; put up in cambric covered form and silicia bag.

Valuable Presents Given for Tobacco Tags for the Entire Year of 1902. These are Exact Fac-similes of the Tags Redeemable under Our Offer Fully Explained Inside R.J. Reynolds Tobacco Company 1902

I gave twenty cents for a yard of silicia (is that the way to spell it?) and suppose everything else has rushed up too.

The Life and Letters of Elizabeth Prentiss George L. Prentiss 1859

Sandblasting is permitted within the EU and the US, but the amount of silicia must be below 1% in the EU and below 0.5% in the US

BBC News - Home 2011