Blue King is an intensely blue Zambian hard stone with sodalite-rich depth and a dark matrix. At ROSSITTIS it is carried as a blue granite for exclusive worktops, walls, stairs and selected external components.
Other trade names: African Blue Granite, Blue King Granite, Foyaite Blue Granite, Karubwe Azul Granite, Karubwe Blue Granite, Karubwe Granite, Sienite Blu, Sienite Blue
About Blue King
Blue King is a material for projects looking for a powerful, clear blue but not wanting the cloudy softness of some quartzites. The surface shows a deep cobalt blue to grey-blue, shot through with a dark matrix and lighter areas. That makes the stone both strong in colour and compact. On large-format slabs in particular this creates a very high-quality, almost mineral-luminous effect, outstandingly suited to kitchen islands, counters, wall panels and exclusive stair claddings.
The stone comes from Zambia and is petrographically a foyaite, or nepheline syenite. In the trade Blue King is nevertheless usually listed as a granite, because it is sold and searched for in exactly this hard stone segment. It is similar to Blue Bahia: granite on the market side, considerably more special geologically. Compared with Blue Bahia, Blue King often appears somewhat grainier and less mottled; against Sodalite it is usually more structured and less semi-precious. Anyone looking for an intense blue hard stone with a clear geological presence gets a strong option here.
Technically, Blue King is hard-wearing: around 2,560 kg/m³ bulk density, approximately 184 MPa compressive strength and frost resistance. At the same time the stone is acid-sensitive, and polished surfaces are not intended to last in external areas. That yields exactly the right reading: not a soft decorative stone, but not an arbitrary standard granite either. For interiors and high-quality applications Blue King is strong; outdoors, matt surfaces should be chosen and the application planned deliberately.
The surface finishes available in stock are listed in the »Finishes« block further down. At ROSSITTIS, Blue King is available as a raw slab, kitchen worktop, vanity top, window sill, skirting, wall cladding and for selected stair and façade details.
The honest assessment: Blue King is not a neutral contract stone. Its strength lies in its blue appearance and geological distinctiveness. Anyone who wants to use that special quality deliberately gets a very striking material. Anyone looking for a completely uncomplicated exterior stone should choose more conservatively.
In stock
Current availability from our warehouse.
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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
2.560 kg/m³
Druckfestigkeit
184,0 MPa
Frostbeständig
Ja
Säurebeständig
Nein
Finishes
Blue King is available in a range of finishes. The finish affects appearance, feel and the care it needs.
Poliert
Politur ist die klassischste Veredelung im Hartgesteinsegment — eine spiegelglatte, hochglänzende Oberfläche mit höchstmöglicher Farbintensität und maximaler Tiefenwirkung der Mineralstruktur. Als säurebeständiges Silikatgestein ist polierter Granit pflegeleicht und für Küchenarbeitsplatten, Wandverkleidungen und repräsentative Sichtflächen erste Wahl.
Care & fabrication
Blue King should be sealed after fabrication, above all on kitchen and wet surfaces. That makes cleaning and care easier and reduces residues of grease, limescale and dyes.
For cleaning and care, pH-neutral natural stone cleaners and soft cloths are suitable. Acidic cleaners are unsuitable despite the hard stone character, because Blue King reacts more sensitively chemically than a classic granite.
On polished interior surfaces, lemon juice, wine and aggressive kitchen chemicals should not be left to act for long. Outdoors the rule is: matt surfaces make more sense than a polish.
With a suitable choice of surface, careful routine cleaning and professional planning, Blue King remains very effective in the long term.
Frequently asked questions
Is Blue King suitable for the kitchen?
Yes, above all for high-quality interior kitchens. With around 2,560 kg/m³ bulk density and approximately 184 MPa compressive strength, Blue King is hard-wearing, but it reacts more sensitively to acids than a classic granite.
Which surfaces are available for Blue King?
The surface finishes available in stock are listed in the »Finishes« block on this page.
Where does Blue King come from?
Blue King comes from Zambia. The stone belongs to the sodalite-rich blue hard stones of southern Africa.
How do I clean and care for Blue King?
For cleaning and care you should use pH-neutral natural stone cleaners and soft cloths. Acidic cleaners are to be avoided.
Is Blue King frost-resistant?
Yes, Blue King is frost-resistant. For external applications, however, matt surfaces should be chosen, because polished surfaces do not remain permanently stable there.
Is Blue King really a granite?
In the trade yes, petrographically no. Geologically it is a foyaite, or nepheline syenite, which is handled on the market as a blue granite.