Alexander Black

Alexander Black is a deep black Indian hard rock with a fine-grained, dense surface. At ROSSITTIS it is used for worktops, floors, stairs, facades and dark accent surfaces, wherever maximum robustness and a calm black material appearance are called for.

Gabbro India 2.795 kg/m³

Available as: Slabs, Skirting, Tiles and flooring slabs · 1 of 42 reserved

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About Alexander Black

Alexander Black is a black Indian hard rock. Its ground colour is deep black to anthracite, its surface fine-grained, dense and very homogeneous. This makes the stone read as calm, technical and without graphic figure — the exact opposite of a heavily veined marble. For dark internal and external surfaces, worktops, stairs and facades it is one of the most load-bearing material combinations the market has to offer.

The stone comes from India, like many of the black hard rocks in international trade. In the natural stone trade the stone is, like other Indian black rocks (Absolute Black, Premium Black and so on), clearly assigned to the granite group. An important distinction: there is a Turkish “Alexandrette Black” on the market as a black marble from Hatay — that is a different stone and not this material.

In stock

Current availability from our warehouse.

42 slabs in stock — 41 available now, 1 reserved · plus 18 blocks

Thicknesses: 1–4 cm · Finishes: Polished, Satin-honed, Polished, reverse satin-honed · Available as: Slabs, Skirting, Tiles and flooring slabs

Updated daily from our live stock.

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Technical data

Guide values for the stone type, taken from manufacturer and test reports. Natural stone is a natural product — individual batches and slabs can differ. For critical applications, request slab-specific test data.

Rohdichte 2.795 kg/m³

Druckfestigkeit 68,5 MPa

Biegezugfestigkeit 7,2 MPa

Wasseraufnahme 0,16 %

Suitability by application

Finishes

Alexander Black is available in a range of finishes. The finish affects appearance, feel and the care it needs.

Polished

Polishing is the most classic finish in the hard stone segment — a mirror-smooth, high-gloss surface with the highest possible colour intensity and maximum depth effect in the mineral structure. As an acid-resistant silicate stone, polished granite is easy to care for and the first choice for kitchen worktops, wall claddings and prestigious exposed surfaces.

Satin-honed

The satin surface is created by brushing, which selectively removes softer minerals and gives the surface a slight depth. A matte appearance with subtle light reflection and a warm feel to the touch. Easy to maintain, insensitive to scratches and suited to everyday use — a popular alternative to a polish in modern kitchens and living spaces.

Polished, reverse satin-honed

A slab usable on both sides: a polished face side with the highest possible colour intensity and mirror gloss, the reverse satin-finished (brushed) with a matt, tactilely warm appeal. A flexible construction for applications in which gloss and matt sides are wanted depending on the installation setting.

Care & fabrication

As a black gabbro and hard rock, Alexander Black is very easy to look after. A sealer is genuinely essential only in heavily used kitchen areas, but there it makes cleaning and care noticeably easier and reduces visible water and soap rings.

For cleaning and care, pH-neutral natural stone cleaners and a soft microfibre cloth are sufficient. Because the stone is acid-resistant, citrus, wine or vinegar do not damage the surface — a clear advantage over black marbles.

On dark polished surfaces, water marks, limescale rings and fingerprints remain visible more quickly than on matter finishes. Regular dry wiping after cleaning keeps the look even.

Outdoors, correct drainage, clean installation and a slip-resistant textured finish matter more than special chemistry. As a hard rock, Alexander Black is permanently load-bearing there.

Frequently asked questions

Is Alexander Black a marble or a granite?

In the trade a black Indian hard rock (granite group). Not a marble — a Turkish “Alexandrette Black” marble of a similar name from Hatay is a different material.

Is Alexander Black suitable for a kitchen?

Yes, very much so. As a dense gabbro the stone is acid-resistant, scratch-resistant and easy to look after — one of the most straightforward options for dark kitchen worktops.

Where does Alexander Black come from?

Alexander Black comes from India and is one of the classic Indian black hard rocks traded internationally as granite.

What finishes are usual for Alexander Black?

The finishes currently available from stock are listed in the »Finishes« block on this page.

Is Alexander Black frost-resistant?

Yes. As a gabbro and hard rock, Alexander Black is very well frost-resistant and suitable for permanent external use.

How do I clean Alexander Black?

For cleaning and care, pH-neutral natural stone cleaners and a soft cloth are sufficient. A sealer is helpful on polished worktops, but not essential everywhere.

What does Alexander Black cost?

The price depends on the batch, thickness, surface finish and fabrication — with natural stone there is no serious flat rate per square metre. Business customers see prices once their B2B account is activated; private customers receive a complete quote through a fabricator near them.