The smaller islands are generally volcanic and show traces of coral limestone.

The areas on which coral limestone is now forming are large.

These singular coral limestone structures are very beautiful, especially when crowned with cocoa-nut trees.

The coral limestone of the atoll has a peculiar vitrified appearance and gives out a ringing sound when struck or simply walked on.

Upon their return to headquarters, men were covering the front with sheets of coral limestone, two balls having passed through the house in the interval.

Fortunately, it was a soft coral rock, or we had all perished.

Paul smashed the man's shoulder with his coral rock, then shouted, Guards!

In the Bishop Museum are many gods of coral rock and lava stone.

A few minutes later the keel ground on the coral rock.

Emmeline, seated on the coral rock, had almost forgotten Dick for a moment.

Also, and more concretely, he was punctuating the rhythm with cobbles of coral stone, which he flung with amazing accuracy through Charley Roberts's windows.

First, two round coral stones, weighing fully forty pounds each, were placed in Tiha's arms.