01 / Geological family
Origin and composition
- Geological family
- Sedimentary
- Origin and composition
- hydrothermal carbonate deposit
- Origin
- Aïn Smara, southwest of Constantine, Algeria
- Appearance and identification
- translucent white, cream, amber and reddish-brown bands
Sedimentary rocks form through accumulation, compaction and cementation of sediments, or precipitation of minerals. Sandstones, limestones and travertines belong to this broad family but have different compositions and structures. Visible bedding can influence slab design and cutting direction. Selection calls for attention to pores, cement, discontinuities and the specific product rather than assuming that every member behaves like one familiar stone.
02 / History and curiosities
History and curiosities
This North African ornamental stone was also used at the Opéra Garnier.
03 / Applications and design
Applications and design
decorative elements, cladding and sculpture.
Finishes and processes ↗04 / Technical interpretation
What to ask your supplier
Do not confuse it with siliceous onyx; assess translucency and veins on the piece.
05 / Care and maintenance
Care and maintenance
Remove dust and grit with soft tools, wash with a compatible neutral cleaner, then rinse and dry. Identify composition before using stain or scale removers: carbonate stones are acid-sensitive. Test every treatment in an inconspicuous area. An impregnator can reduce absorption but does not make a material waterproof or stain-proof.
Thoughtful cleaning, protection and maintenance ↗07 / Sources and further reading
