Slate: types, applications, colors and prices

We bring you the best information about calibrated slate: textures, colors, prices per square meter (m2), types, environments, finishes and uses.

What is calibrated slate and what is it made of?

Calibrated slate is a variety of natural stone, specifically a metamorphic stone, characterized by its ability to split into thin, flat sheets. This distinctive characteristic is due to its geological formation and mineral composition.

Calibrated slate originates from the transformation of clayey sedimentary rocks under conditions of intense heat and pressure in the geological process known as metamorphism. Clay and sediments are subjected to high temperatures and pressures, which causes recrystallization and compaction of the minerals present.

The mineral composition of calibrated slate includes minerals such as quartz, mica, chlorite and various clay minerals. These minerals contribute to the texture and strength of slate. The presence of minerals such as chlorite can give rise to green tones in some varieties of slate.

The ability to split into thin sheets is a result of the alignment of minerals during the process of metamorphism, creating cleavage planes along which shale can break with relative ease. This feature makes calibrated slate especially useful in applications such as wall coverings, roof coverings and flooring, where the ease of handling and distinctive aesthetics of thin sheets are sought.

Where does the calibrated slate come from?

Calibrated slate is extracted from quarries and deposits located in different parts of the world. Some of the regions known to have gauged shale deposits include:

  1. Spain: Spain is a major producer of calibrated slate, and several regions, such as the "Valongo Slate" area in the province of Ourense, are known for the extraction of this material.
  2. China: China is another country with abundant deposits of calibrated slate. Several quarries in different provinces, such as Guangdong and Shaanxi, contribute significantly to global production.
  3. Brazil: In Brazil, especially in the Minas Gerais region, there are quarries that produce high quality calibrated slate.
  4. India: India is also known for having calibrated slate deposits. Some states, such as Rajasthan, are known for their natural slate production.
  5. United States and Canada: Some regions of the United States and Canada also have deposits of calibrated slate, contributing to the global supply.

The choice of quarry may depend on factors such as slate quality, color, texture and other specific attributes of the material being sought. Each region can offer slate with particular characteristics, which influences its demand and use in various construction and design applications.

How colors are formed on calibrated boards

The colors in calibrated slates are formed due to the presence of specific minerals and compounds during the geological process of formation. Calibrated slate, as a metamorphic stone, undergoes changes in its mineral composition and structure during metamorphism. The minerals present and the environmental conditions during this process influence the final colors of the slate. Below are some of the factors that contribute to the formation of colors on calibrated boards:

  1. Minerals Present: The minerals that make up slate, such as chlorite, mica, quartz, and other clay minerals, can have specific colors. For example, the presence of chlorite can impart green hues to slate.
  2. Impurities and Chemical Elements: The presence of impurities and chemical elements in slate can affect its color. Iron oxides, for example, can control

Main uses of calibrated whiteboard

Calibrated slate is a versatile material that is used in a variety of applications in the field of construction and decoration due to its aesthetic and functional properties. Some of the main uses of calibrated whiteboard are listed below:

  1. Roof Coverings: Calibrated slate is commonly used as a roof covering material. Its thin sheets and weather resistance make it ideal for this application.
  2. Wall Coverings: Indoors and outdoors, calibrated slate is used to cover walls, providing an elegant appearance and a durable surface.
  3. Pavements and Floors: Calibrated slate is used in the creation of pavements and floors, especially in areas where a resistant and easy-to-maintain surface is sought.
  4. Decorative Elements: Sculpted or cut into specific shapes, sheets of calibrated slate are used to create decorative elements both outdoors and indoors.
  5. Boards and Panels: Calibrated slate can be cut into boards or panels for use in design and construction projects, providing a unique and attractive surface.
  6. Architectural Elements: Used for architectural elements such as stairs, door thresholds and ornamental details.

Calibrated slate is prized for its strength, durability and ability to break into thin sheets, making it easy to handle in a variety of applications. Its natural appearance and wide range of colors make it a popular choice in construction and architectural design projects.

Colors and shades of the calibrated board

Calibrated slates exhibit a wide variety of colors, making them a popular choice for construction and design applications due to their aesthetic appeal.

We bring you some of the most common colors of calibrated boards below. These color variations not only offer diverse aesthetic options, but also allow designers and architects to choose calibrated boards that best fit a project's specific style and vision.

Applications and uses of calibrated whiteboard

Calibrated slate is a popular and versatile choice for construction due to several beneficial characteristics such as aesthetics, strength and durability.

The best calibrated whiteboards from our factory to your home

At Tienda del Mármol - Mármoles Andrés Marín we are manufacturers of the main calibrated slates of the moment, such as black, gray, green, multicolored or Patagonia quartzite with which we do everything type of applications and we send them to any part of the world where you need them, at low prices without intermediaries.

We can produce large quantities thanks to our technology and our work team to supply the amount of slate you need at all times with very short shipping times.

We ship calibrated whiteboards to any part of the world

We have preferential agreements with both national and international means of transport to be able to take our best calibrated slate to any part of the world at very reasonable prices. Ask us for a quote for the natural stone you need and we will immediately send you prices for shipping costs.

Hundreds of residences and all types of works around the world are built with calibrated slate from our factory in Caravaca, with countries such as France or Switzerland being the main export destinations.

Calibrated slate finishes/treatments

We call finishing any treatment that is carried out on the slate and that provides a touch of beauty and, above all, covers the habitability needs that it requires. We detail below those that we apply on the calibrated board.


Raw Marble

The finish of raw, sawn or cut marble is achieved by sawing the piece of marble with diamond discs or strips. The result is a rough, scratchy and dull marble.

Uses of raw marble

  • Exterior floors and paving, due to its grip capacity
  • Interior floors for polishing "in situ", it is the ideal to achieve the best result

We are manufactures We manufacture for you
Quick Deliveries We ship worldwide
Factory prices Without intermediaries
Wide Catalog Assorted colors
Quality whiteboard Specially selected
Cut to size projects With personalized attention

What is the price of the calibrated board? How is the square meter of slate?

The price of the highest quality calibrated slate, like the one we manufacture at, will depend on factors such as the color, type or the treatment applied to its face or edge. The price of slate per square meter is also affected by the size of the piece and especially by the quantity. What is the price per square meter (m2) of calibrated slate? we bring you a table of prices per m2 of the different slates in their most common formats and various treatments that are apply. Taxes, shipping or quantity discounts are not included.

Types of calibrated slate Polish Rawn Honed Aged Sandblasted Bushhamered
Gray Slate
(Losas de 60x30x1 cm)
Multicolor slate
(Losas de 40x20x1 cm)
Green Slate
(Losas de 60x30x1 cm)
black slate
(Losas de 60x40x1 cm)
Patagonia Quartzite
(Losas de cm)

(Losas de cm)

(Losas de cm)

Advantages of calibrated whiteboard in Architecture and Interior Design

    Calibrated slate is a popular choice for various construction and design applications due to its many advantages. Below are some of the main advantages of calibrated whiteboard:

    • Attractive Aesthetics: Calibrated slate offers a natural and attractive appearance with a wide variety of colors, making it an aesthetic choice for wall and floor tiles.
    • Durability: It is known for its durability and resistance to inclement weather, maintaining its attractive appearance over time.
    • Low Maintenance: Calibrated whiteboard requires little maintenance. It is not prone to fading and retains its appearance with occasional cleaning.
    • Slip Resistance: In vertical applications, such as facades, calibrated slate usually has a surface that is easy to clean and is slip resistant.
    • Application Versatility: Can be used in a variety of applications, including roof coverings, wall coverings, flooring, decorative elements and more.
    • Design Adaptability: Calibrated slate is cut into thin sheets, making it easy to adapt to different architectural designs and patterns.

    These advantages make calibrated slate a popular choice for those looking for a durable, aesthetically pleasing and versatile material in a variety of construction and design applications.

Disadvantages of calibrated whiteboard in your home

    While calibrated whiteboard has several advantages, it is also important to consider some disadvantages before selecting it for a project. Below are some of the disadvantages of calibrated whiteboard:

    • Initial Cost: Calibrated slate may have a higher initial cost compared to some other cladding materials, which can affect the project budget.
    • Specialized Installation: Installing calibrated slate requires specialized skills due to the precision needed when working with thin sheets. This can increase installation costs.
    • Brittleness: Although slate is durable, gauged sheets can be more brittle than other types of slate, especially if subjected to excessive loads or impacts.
    • Color Variability: The natural variability in the color of the slate can be a disadvantage if uniformity is sought. Some pieces may have slightly different shades.
    • Occasional Sealing Required: Although calibrated slate is durable, in some cases it may require occasional sealing to maintain its integrity and water resistance.
    • Thermal Limitations: In areas with extreme temperature changes, calibrated slate may have thermal limitations that must be taken into account during installation.

    Considering these disadvantages along with the advantages will allow you to make informed decisions about the suitability of calibrated whiteboard for a specific project.

Frequently asked questions from our customers about calibrated whiteboard

These are the most frequently asked questions from our customers about the calibrated whiteboard in our help channels. I hope they help you resolve your questions, but if not, contact us through one of our channels and we will give you a quick, free and no-obligation response.

Contact us

Send WhatsApp