出典:Wiktionary
出典:『Wiktionary』 (2026/02/11 21:18 UTC 版)
From soap + stone; so called because the archetypal varieties of the stone resemble soap in multiple ways: their feel, appearance, and carvability. First use appears c. 1681, in the writings of Nehemiah Grew.
soapstone (countable and uncountable, plural soapstones)
soapstone (third-person singular simple present soapstones, present participle soapstoning, simple past and past participle soapstoned)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/06 19:44 UTC 版)
Soapstone (also known as steatite or soaprock) is a metamorphic rock, a talc-schist. It is largely composed of the mineral talc and is thus rich in magnesium. It is produced by dynamothermal metamorphism and metasomatism, which occurs in the areas where tectonic plates are subducted, changing rocks by heat and pressure, with influx of fluids, but without melting. It has been a medium for carving for thousands of years.