-Columbia Grey-
Description & Features
In the Essential series, which Belenco describes as a choice of quality materials with simple, functional details, Columbia Grey – Columbia Gray in its official name – is one of the most pared-back options. It is a clean, neutral medium grey, almost solid: in the photo the surface is even from edge to edge, with an extremely fine grain visible only very close up, without veins, specks or patches. This uniformity, typical of quartz surfaces, makes it easier to keep the colour consistent from slab to slab on large surfaces. It is produced with Bretonstone technology in Manisa by Lotte Chemical and, according to Belenco's data, has water absorption of 0.04%, compressive strength of about 230 MPa, impact resistance ≥ 3 J and reaction to fire A2-s1,d0. It is supplied in a polished finish, in Jumbo 165 × 330 cm or Extra 152 × 310 cm slabs, 15, 20 or 30 mm thick. Its even look is used for kitchen countertops, islands, bathrooms and furniture, as well as for large areas of wall cladding, stairs and interior floors. Care needs only a damp cloth with a little neutral liquid soap; no sealing is required, but hot cookware needs a trivet, and solvents, strong acids and alkalis should be avoided.
Why choose Columbia Grey
- Solid medium grey without veins
- Belenco Essential series (Columbia Gray)
- Even colour for large continuous surfaces
- Reaction to fire A2-s1,d0
Technical Specifications
| Material | Engineered quartz composite – quartz grains bound with resin, Bretonstone technology |
| Country of Origin | Turkey |
| Production site | Manisa Organised Industrial Zone (Belenco – Lotte Chemical plant) |
| Color & Pattern | Even, neutral medium grey, solid colour, with an extremely fine grain and no veins |
| Hardness (Mohs) | ≈7 (quartz – typical value, not stated by Belenco) |
| Density (g/cm³) | 2.3–2.4 (Belenco data, EN 14617-1 / ASTM C97) |
| Water Absorption (%) | 0.04 (ASTM C97) · class W4, ≤ 0.05 per EN 14617-1 |
| Compressive Strength (MPa) | ≈230 (dry specimen, ASTM C170 – Belenco data) |
| Flexural Strength (MPa) | ≥ 40 (class F4, EN 14617-2) · ≈47 per ASTM C880 |
| Frost Resistance | Freeze–thaw resistant (EN 14617-5, KMf25 = 0.98); Belenco publishes guidelines for mechanically fixed facade cladding, but for sun-exposed exterior use, request confirmation for the specific colour (UV) |
| Acid Sensitivity | High chemical resistance (class C4, EN 14617-10); avoid strong acids (hydrochloric, nitric), alkalis above pH 8.5 and solvents |
| Recommended Finishes | Polished |
Common Applications
Frequently Asked Questions
Export & project supply
SKARIS MARBLE supplies Columbia Grey to stone importers, fabricators, architects and hotel projects outside Greece. From our facility in Thessaloniki we handle the whole order in-house:
- Slab selection and matching – we grade and match the slabs for colour and veining, so a large order stays uniform across the whole project.
- Cut-to-size and finishing – pieces cut, edged and finished to your drawings, numbered per room or elevation and ready to install.
- Mixed shipments – Greek marbles, granites, porous limestone (porolithos) and quartz surfaces can be combined in one order.
- Export packing – crated and labelled for sea or road freight, ex-works Thessaloniki; delivered terms quoted on request.
Send us your drawings or quantities and we will come back with a quotation and availability.
