Epidote is an abundant rock-forming mineral, but one of secondary origin. It occurs in marble and schistose rocks of metamorphic origin. It is also a product of hydrothermal alteration of various minerals (feldspars, micas, pyroxenes, amphiboles, …

Epidote is the word used for a calcium-iron silicate mineral that forms through regional and contact metamorphism. It is also the name of a diverse group of silicate minerals that often contain rare earth elements.

Comments: Dark green, blocky epidote with transparent quartz. Location: Copper Mt., Prince of Wales, Alaska. Scale: 7 x 5 cm. Warning: this large pop-up is very compute intensive and may not work well with some computers. Yellowish green, Brownish green, Black, Yellow, Gray. Regular - Flat surfaces (not cleavage) fractured in a regular pattern.

NAGASHIMA, Mariko (2006) Hydrothermal syntheses of epidote and piemontites on the join Ca2Al2Fe3+Si3O12 (OH)-Ca2Al2Mn3+Si3O12 (OH) at relatively low pressures of 200-400 MPa.

2023年8月29日 · Hardness, Cleavage, and Fracture: Epidote has a hardness ranging from 6 to 7 on the Mohs scale, which means it is moderately hard. This hardness allows it to be cut and polished for use in jewelry and other ornamental applications.

Hardness: 6 to 7 Specific Gravity: 3.25 to 3.5. Cleavage: One direction. Crystal Forms and Habits: Monoclinic system. Crystals are prismatic. Epidote commonly forms as a thin coating along fractures in rocks. Epidote also is commonly found in massive form. Mineral Associations: A common metamorphic mineral.

Epidote is typically green, but it can also be yellow-brown, black or colorless. The mineral has a hardness of 6 to 7 on the Mohs scale and has a vitreous to resinous luster. Epidote is commonly found in prismatic or tabular crystal habit and can also occur in massive or granular form.

2023年8月25日 · Epidote is a 6 to 7 on the Mohs hardness scale, meaning it’s harder to scratch with your fingernail. The magnet test might offer a clue as to whether your specimen is epidote or not. Because the stone is iron-rich, it can be somewhat attracted to magnets.

Epidote is a calcium aluminum iron silicate mineral that belongs to the group of sorosilicates. It has a chemical formula of Ca2 (Al,Fe)3 (SiO4)3 (OH) and a hardness of 6-7 on the Mohs scale.

Hardness: On the Mohs scale of mineral hardness, epidote ranges from 6 to 7, making it relatively hard. Cleavage: Epidote exhibits perfect cleavage in one direction, meaning it tends to break along flat planes. Fracture: Its fracture is uneven to conchoidal.