The order Insectivora is no longer recognised by biologists.

The reagent is selected from the group consisting of biotite, vermiculite, hydrobiotite, hydrophlogopite, glauconite, illite, montmorillonite, muscovite, saponite.

May contain a minor amount of biotite or hornblende.

Accessory, interstitial minerals are K-feldspar, apatite and biotite.

The biotite-magnetite granite is medium grained and foliated.

The host rocks bordering the veins are highly altered; feldspars and biotite are illitized.

In greater detail, the rock is a biotite granite leucocratic glandular augen-gneiss with micro-pegmatite tendency; in the picture we can see the k-feldsphatic coarse-grained “eyes” and the black biotite lamellae.

Pyrrhotite crystals surrounded by biotite are also observed in gabbronorite.

The pink crystals are feldspar, the white are quartzite and the black is mica.

Biotite - a hydrous mineral that is stable to very high grades of metamorphism.

The most typical inclusions in Peridots, described as “lily pads”, are grains of biotite.

Hornblende and biotite are both black, but they can be easily distinguished by their crystal form because biotite occurs in sheets, while hornblende forms stout prisms (Figure 2).

Smaller amounts of proxene, biotite and quarts may also be found in diorite.

It also contains biotite, amphibole, magnetite and trace K-feldspar.

The formation of smectite alongside the simultaneous preservation of biotite, is likely a rarity.