Almandine in Phyllite

**Almandine**

**Chemical composition:** Fe₃Al₂[SiO₄]₃

**Hardness:** 7‒7.5

**Density:** 4.3 g/cm³

**Crystal system:** Isometric (Cubic)

**Luster:** Vitreous

**Info:** Almandine is the most common garnet with deep red colour and usually with purplish to brownish tint. It occurs mainly in metamorphic rocks such as shales, mica schists and amphibolites.



**Phyllite**

**Petrology:** Sericite, chlorite, quartz, plagioclase (albite), biotite are rock-forming minerals. Chlorite causes grey-green colour, sericite typical silky luster.

**Genesis:** Phyllite is a type of foliated metamorphic rock created from shale or pelite. Phyllites are usually black to grey or light greenish grey in colour. It has a good fissility (a tendency to split into sheets).

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