People sometimes call it tufa, like those stones you see in fish tanks.    From Wordnik.com.  [CSI: Crime Scene Investigation: Skin Deep] Reference

It's not actually known what Edwin's symbol was Bede says he used a Roman-style standard called a tufa but doesn't describe it.    From Wordnik.com.  [Flight of the Sparrow, by Fay Sampson. Book review] Reference

The etymology of Latin tofus 'tufa' isn't written.    From Wordnik.com.  [The diffusion of the Italian terms for 'wine' from Etruscan] Reference

The etymology of Latin tofus 'tufa' isn't written in stone.    From Wordnik.com.  [Archive 2009-10-01] Reference

Paleoglot: The etymology of Latin tofus 'tufa' isn't written in stone skip to main.    From Wordnik.com.  [The etymology of Latin tofus 'tufa' isn't written in stone] Reference

Heracl.1.137, then further suggested that it be traced to Latin tōfus 'tufa' which in turn was stated to probably come from an Italic dialect.    From Wordnik.com.  [Archive 2009-10-01] Reference

Above and/or below some of the lakes are calcareous tufa dykes and shoals.    From Wordnik.com.  [Jiuzhaigou Valley Scenic and Historic Interest Area, China] Reference

Material: a grey or a white limestone most usual; tufa and dolerite also used.    From Wordnik.com.  [How to Observe in Archaeology] Reference

Most of the churches and palaces and houses of Orvieto were also built of tufa.    From Wordnik.com.  [The Saracen: Land of the Infidel] Reference

The road that wound down past the gray-yellow folds of tufa was filled with people.    From Wordnik.com.  [The Saracen: Land of the Infidel] Reference

Palatine Hill, were all built of the brown volcanic tufa found on or near their sites.    From Wordnik.com.  [Roman Mosaics Or, Studies in Rome and Its Neighbourhood] Reference

It was built by the Romans, of very strong material, tufa, concrete, and red-tile brick.    From Wordnik.com.  [Grace Darling Heroine of the Farne Islands] Reference

They stood inside a high wall of cream-colored tufa, the same rock on which Orvieto stood.    From Wordnik.com.  [The Saracen: Land of the Infidel] Reference

In red tufa it is copious and good, if it does not run down through the fissures and escape.    From Wordnik.com.  [The Ten Books on Architecture] Reference

They include fantastic rock formations, karst cliffs and caves and terraces of calcareous tufa.    From Wordnik.com.  [Three Parallel Rivers of Yunnan Protected Areas, China] Reference

The different horizontal layers or beds of tufa vary very much in hardness and also in thickness.    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

It was excavated through volcanic tufa and was 3,000 feet long, 25 feet wide, and of the pointed arch style.    From Wordnik.com.  [Marvels of Modern Science] Reference

Pearl Shoal Fall lies at the downstream end of the Zhengshutan which is the largest of the tufa shoals in the reserve.    From Wordnik.com.  [Jiuzhaigou Valley Scenic and Historic Interest Area, China] Reference

He turned and stared back at the mansion, a great cream-colored cube of the same tufa as the rock on which Orvieto stood.    From Wordnik.com.  [The Saracen: Land of the Infidel] Reference

Valia reached into her pocket and found a piece of pink tufa stone, a reminder of the home that she would never see again.    From Wordnik.com.  [The Other Side (revision)] Reference

Campania, red and black tufas; in Umbria, Picenum, and Venetia, white tufa which can be cut with a toothed saw, like wood.    From Wordnik.com.  [The Ten Books on Architecture] Reference

The town lay on a hill of tufa, running from N.E. to S.W., isolated except on the N.E., and about 300 ft. above sea-level.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"] Reference

Attributed to Paul Heermann and Johann Christoph Hübner Amethyst, tufa, serpentine, breccia, and gilded bronze H: 21-7/8 in.    From Wordnik.com.  [Royal Treasures at the Met] Reference

The central room contains sarcophagi, urns and statuary in marble, alabaster, porous tufa and other kinds of stone, and clay.    From Wordnik.com.  [Etruscan Treasures From Tuscany] Reference

Ten shafts lined with slabs of tufa which were there found may have been the approaches to tombs or may have served as wells.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"] Reference

Ascending the slope, we entered a long narrow passage about six feet wide and about fourteen feet deep cut through the tufa rock.    From Wordnik.com.  [Roman Mosaics Or, Studies in Rome and Its Neighbourhood] Reference

Lavas dominate on narrow plateaux on the eastern and western side of the main island, while the central plateau is cut into tufa.    From Wordnik.com.  [Brazilian Atlantic Islands, Brazil] Reference

The catacombs were hewn only in the tufa granolare, and were consequently excavated expressly for burials by the early Christians.    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

The soft bed of Pozzolana sand was, however, not generally used for interments, but the harder bed under it, called "tufa granulare.".    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

It was probably at first a natural spring gushing out of the tufa rock of the Palatine Hill, but being dried up, it became in later times a.    From Wordnik.com.  [Roman Mosaics Or, Studies in Rome and Its Neighbourhood] Reference

It is cut out of the tufa rock, and was no doubt used by that people for festal representations long before Rome attempted anything of the kind.    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

Giselle Gos (Archaeology, University of Toronto) sits inside the tufa impluvium while sketching a trench cut through the atrium's cocciopesto floor.    From Wordnik.com.  [Interactive Dig Pompeii - Field Notes: August 5, 2002] Reference

The peculiarly dry and drying nature of the sandstone, or tufa rock, in which these tombs are excavated, made them admirably calculated for the purpose.    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

A misadventure on California's Mono Lake, a bizarre alkaline sea studded with tufa towers and lousy with flies and brine shrimp, proves that his luck can indeed get worse.    From Wordnik.com.  [Twain's American Journey] Reference

Its final-phase tufa impluvium and those unimpressive cocciopesto floors underline the architectural, economic, and social discrepancies apparent from one house to the next.    From Wordnik.com.  [Interactive Dig Pompeii - Field Notes: August 5, 2002] Reference