Continental Trade Sp. z o. o.


Mica blocks

Mica blocks (sheets)

Mica sheets are almost unprocessed form of the natural mica. They are simply sheets of mica extracted from the mine, cleaned and sorted by size and quality. Mica sheets in the trade are in a form of irregularly shaped sheets with different thicknesses and different qualities.

Mica sheets, also called block mica, are natural mica sheets of irregular shape and thickness from 0.18 to 16.00 mm. Mica occurs very commonly in sheets of area size from 6 to 90 cm2. Larger sizes are very rare (and thus - very expensive).

Mica sheet has been classified according to various criteria such as the size of the plates, thickness, purity or transparency mica. The classification rules are described here.

With plates of mica are made shields, windows, disk, and various other elements of electricity or thermal insulation. Residue remaining after the mica block selecting is waste - scrap of mica, used as a raw material for the production of flakespowders (grounded mica), pigments and other insulating materials based on mica (micanite).

Mica sheets are available in a wide range of size (see here). Mica plates are also available in customized sizes, cut according to specifications required by our clients. We employ a team of highly skilled technicians who manually grade and cut the mica blocks to ensure zero-defects in the finished product. 

Quality class of natural mica define its transparency, limit the amount and type of pollutants. Smaller amount of impurities and discoloration, the higher value (and price) of the mica sheet. In accordance with the standards proposed by ASTM (American Society for Testing and Material) and stored in the form of a Standard D 351 Classification for Natural Muscovite Block Mica and Thins Based on Visual Quality distinguished grade from V1 (highest) to V10 (the lowest). Mica with quality class V1 is often called as collectable mica (see below). Mica quality standards are discussed here.

Sizes od mica sheets have also been standardized. Distinguished by the size of the category OOEE Special (highest) to No. 6 (smallest). Classification of the size of the mica blocks is discussed here. When increasing the size of the mica sheet (higher category), is also growing its unit price.

Collectable mica (top quality)

Comparison of mica V1 and V8.

Highest quality mica (class V1) is called the collectable mica. It is the most expensive, but almost devoid of blemishes (occlusion), discoloration and contamination. It is often purchased by research institutes and laboratories.


The picture on the right shows the comparison of mica V1 and V8.

Rules for the sale mica blocks

Mica blocks are usually sold in situations where standard shapes of natural mica ie. shields, windows, discs do not meet the requirements of customers in terms of size, quality or thickness. In this case, we search for the smallest sheet of mica, which includes the required size of the plate and meets the other requirements of the order.

Mica block is sold by weight. Price depends on the quality class and the size category. Plate thickness directly affects its weight.

We usually offer mica plates with a thickness from 0.1 mm - up to 1.5 mm and dimensions in the category from No. 2 to No. 6 in all classes (including collectable mica Class V1).

Please contact us before ordering.

Information clause

What personal data are processed and who is their administrator?

When using our services, personal data that we process may be, for example, the IP address of your device, data obtained from cookies or similar mechanisms for recording information in Users' devices, as long as they allow you to identify you. More information about the scope of personal data and cookies can be found in the Cookies policy and in Privacy policy.

Administrator, ie the entity deciding on which personal data will be processed and for what purpose, and in what way, is Continental Trade Sp. z o.o. (hereinafter "Continental Trade" or "We") with its registered office and address in Warsaw at Krasnobrodzka Street 5.

What is the purpose and basis of the processing of your personal data by Continental Trade ?

Continental Trade processes your personal data to enable you to use our services, match the displayed content and ads to your interests, measure quality and effectiveness, improve content and services.

The basis for the processing of personal data is the legitimate interest of Continental Trade. It includes improving services, ensuring their best quality and informing Users about them.

Confirming that you have read this information,   by clicking on "Go to website" or closing this window at the same time you agree that your personal data will be processed in the same way as described here. You can manage your consent, including withdrawal.

Providing personal information is voluntary.

What are your rights to   Continental Trade in terms of processed data?

You can request from Continental Trade: access to data, rectification, deletion, transfer and, in some cases, processing restrictions, and you have the right to object to the processing of your personal data when personal data are processed on the basis of the legitimate interest of the administrator. You have the right to file a complaint regarding the processing of your personal data to the President of the Office of Personal Data Protection.

To whom does Continental Trade share your personal data?

Continental Trade, in principle, does not share your personal data with third parties, except for situations in which Continental Trade has a legal basis, including at the request of authorized entities, or when it is necessary to perform services offered by Continental Trade, e.g. entrepreneurs providing hosting of our services.

How long does Continental Trade store your personal data?

Continental Trade stores Users' personal data only for the time that is necessary to achieve the purposes for which the data was collected and provided that one of the legal grounds described above is up-to-date or when a new ground has appeared, e.g. a law or the need to enforce claims in court proceedings.

Who can you contact for more information on the processing of personal data by Continental Trade?

If you have questions related to the processing of your personal data on websites operated by Continental Trade or would like to report the issue related to the processing of personal data by Continental Trade, you can contact a Continental Trade representative using the contact information:

More information on the protection of your personal data can be found in the Cookie Policy and Security Policy documents published on our website