Black Mica

Black mica is commonly known as biotite, which belongs to the mica group of minerals. Micas are sheet silicate minerals that are characterized by their perfect cleavage, allowing them to be split into thin, flexible sheets. Biotite is one of the most abundant micas and is typically dark brown to black in color, due to its higher content of iron and magnesium compared to other mica varieties like muscovite (which is lighter in color).

Key Characteristics of Black Mica

Color

Biotite is usually black or dark brown, sometimes appearing greenish due to the presence of iron and magnesium.

Like all micas, biotite exhibits perfect basal cleavage, which means it splits easily into thin, flexible sheets.

Cleavage

Luster

It has a vitreous (glassy) to pearly luster on cleavage surfaces.

Biotite is relatively soft, rating between 2.5 and 3 on the Mohs scale.

Hardness

Black Mica, or biotite, is a common and geologically significant mineral that plays an important role in understanding the formation of igneous and metamorphic rocks. Its physical properties, such as cleavage and color, make it distinct, and it is widely used in geology for rock classification and dating. In New Zealand, nephrite, or pounamu, is considered a taonga (treasure) by the Māori people, and it plays a crucial role in their cultural heritage. It was traditionally used for tools, weapons, and ornaments, and it is still used today in jewelry and carvings.

For inquiries related to product specifications, ordering, pricing, and delivery, please send your message