01 Natural stone comparison
A side-by-side comparison of Harmony Grey and Alexander Black — origin, colour, finishes, applications and best use cases — to help architects and designers choose the right natural stone for their project.
Harmony Grey Marble is a Turkish grey marble with a cool mineral base crossed by distinctive rust, copper and pale vein accents. Quarried in Türkiye and available in polished, honed and leathered finishes, it is specified for feature walls, dining tables, stair details, hospitality interiors and spa surfaces where natural movement and contemporary character are desired.
View Harmony Grey ↗
Alexander Black Marble is a Turkish black marble with a deep black background animated by crisp white mineral veining. Quarried in Türkiye and available in polished, honed and leathered finishes, it is specified for feature walls, staircases, reception counters, restaurant interiors, bathrooms and custom furniture seeking bold contrast and timeless natural character.
View Alexander Black ↗02 Specification comparison
| Property | Harmony Grey | Alexander Black |
|---|---|---|
| Category | Marble | Marble |
| Origin | Türkiye | Türkiye |
| Colour | Grey | Black |
| Tone | Mineral grey | Noir black |
| Available finishes | Polished, Honed, Leathered | Polished, Honed, Leathered |
| Available forms | Slab, Tile, Cut-to-size | Slab, Tile, Cut-to-size |
| Bookmatch | Selection dependent | Available |
| Applications | Flooring, Wall cladding, Bathrooms, Countertops, Feature walls | Flooring, Wall cladding, Bathrooms, Countertops, Feature walls |
03 Which stone to choose
The project calls for a grey marble from Türkiye with 3 finish options (polished, honed, leathered) and selection-dependent bookmatch availability. Its character suits flooring, wall cladding, bathrooms and pairs naturally with warm timber, metal and natural material palettes.
Explore Harmony Grey ↗The project calls for a black marble from Türkiye with 3 finish options (polished, honed, leathered) and bookmatch availability. Its character suits flooring, wall cladding, bathrooms and pairs naturally with warm timber, metal and natural material palettes.
Explore Alexander Black ↗Both Harmony Grey and Alexander Black are available as slabs, tiles and cut-to-size pieces from Terra Natural Stone. Request samples to compare the materials in person before specifying.
04 Frequently asked
Harmony Grey is a grey marble from Türkiye with 3 finish options, while Alexander Black is a black marble from Türkiye with 3 finish options. Harmony Grey suits flooring and wall cladding; Alexander Black suits flooring and wall cladding.
Both can work for flooring. Harmony Grey offers a mineral grey character with polished, honed, leathered finishes. Alexander Black offers a noir black character with polished, honed, leathered finishes. The choice depends on the project's colour palette, traffic expectations and whether a polished, honed or textured surface is preferred.
Harmony Grey: selection dependent. Alexander Black: bookmatch available. Bookmatching is most effective on feature walls and large surfaces where the mirrored vein pattern can be appreciated at scale.
Harmony Grey is available in polished, honed, leathered. Alexander Black is available in polished, honed, leathered. Polishing intensifies colour and reflection; honing creates a softer matte surface; textured finishes add tactility and slip resistance.
Compare in person