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Poros stone is a lightweight, soft, marly limestone that was widely used in construction and statues of Ancient Greece. [1] There is no precise definition of the term, although its roots go to antiquity, [2] when it was used to designate any porous building rock, [3] regardless of its origin, [4] mostly in contrast with marble. In the 20th ...
Alabaster is a porous stone and can be dyed into any colour or shade, a technique used for centuries. [13] For this the stone needs to be fully immersed in various pigment solutions and heated to a specific temperature. [13] The technique can be used to disguise alabaster. In this way an imitation of coral that is called "alabaster coral" is ...
More generally in construction, specifically the dimension stone trade, the term marble is used for any crystalline calcitic rock (and some non-calcitic rocks) useful as building stone. For example, Tennessee marble is really a dense granular fossiliferous gray to pink to maroon Ordovician limestone, that geologists call the Holston Formation .
The first temple dedicated to Athena was made of grey-shaded porous stone and was constructed in the 7th century BC. It was probably the earliest Doric temple, of which twelve columns have been preserved, along with the foundations and the crepidoma and stylobate. The columns were crowned by low capitals and bore shallow flutings.
A stone vessel is a hollow container, made of stone. Stone mortars and pestles have been used by the Kebaran culture (the Levant with Sinai) from 22000 to 18000 BC to crush grains and other plant material. The Kebaran mortars that have been found are sculpted, slightly conical bowls of porous stone. [1]
Tufa columns at Mono Lake, California. Tufa is a variety of limestone formed when carbonate minerals precipitate out of water in unheated rivers or lakes. Geothermally heated hot springs sometimes produce similar (but less porous) carbonate deposits, which are known as travertine or thermogene travertine.
Archaeologists discovered an ancient stone slab with 123 hieroglyphic symbols in Mexico, revealing the founding of a town in 569 AD and details about Maya rulers.
Pumice in powdered form was an ingredient in toothpastes in ancient Rome. [31] Nail care was very important in ancient China; nails were kept groomed with pumice stones, and pumice stones were also used to remove calluses. It was discovered in a Roman poem that pumice was used to remove dead skin as far back as 100 BC, and likely before then. [32]