- a mineral, calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals.
Origin of epidote
Examples from the Web for epidote
Historical Examples of epidote
Mica, epidote, and chlorite are also present as accessories.Volcanoes: Past and Present
A rock composed of quartz and epidote is known as epidosite.
Fragments of epidote, porphyry and flinty quartzite lay around.A Report on Washington Territory
William Henry Ruffner
Quartz is not much harder than epidote; the strength is only supposed to be in some proportion to the squares of the diameters.
He lets the pale little film of epidote grow right past him; stopping his own summit for it; and he never himself grows any more.
- a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic crystalline form: common in metamorphic rocks. Formula: Ca 2 (Al,Fe) 3 (SiO 4) 3 (OH)
Word Origin for epidote
- A yellowish-green or blackish-green monoclinic mineral. Epidote occurs as formless grains or as prism-shaped crystals, and is found in limestones that have undergone slight metamorphism or in igneous rocks. Chemical formula: Ca2(Al, Fe)3(SiO4)3OH.