Cosmic Black

Stoneza — Anantay Exports Pvt. Ltd. — is a quarry-direct manufacturer, processor and exporter of Natural sandstone, operating from Bhilwara, Rajasthan since 1992. We operate quarries at Bijolia, Kota and Asind alongside verified direct quarry networks across India, processing and calibrating every order through our in-house factories in Bhilwara with zero middle trader markups. We supply pan-India and export worldwide.

Send the quantity, the finish and thickness you need, and the delivery location. We come back with a firm quarry-direct quotation and a confirmed lead time. Thickness and finish options are confirmed at quotation stage. Because we quarry and process ourselves, the quotation comes from the works rather than through a trader — and we would rather quote against a real drawing than hand you an indicative range that changes later.

Cosmic Black is the quarry and trade name; Cosmic Black is our name for it. The spec code is STZ-NM-COBL. Quote the spec code on a BOQ rather than either name — the same stone is sold under several names across India, which is exactly how substitution happens on site after a specification is approved.

The stone as it comes — flat, matt and slightly open in the grain. The most economical finish and a genuinely good one: it holds grip, hides wear, and lets the material read as stone rather than as a product. Nothing is added. The slab is sawn to thickness and calibrated on the back, and the face is left as the blade or the bed produced it. Every other finish starts here. Wet grip: high — suits wet areas. Grip when wet, no glare under low sun, and it weathers into a building rather than standing apart from it.

Sweep and damp-mop. No sealing required on low-absorption stone. If it ever looks tired it can be honed or polished in place decades later.

Size: Random 4" - 18". Thickness: 30-40 mm. Supplied crated random flags at approximately 85–110 kg/m². Custom sizing is available on project orders — send the setting-out and we will cut to it.

Full mortar bed on concrete base. Joint: 10-20 mm pigmented joint. Settle the substrate and the fixing detail with your consultant at design stage rather than on site — it is the single thing most often left too late, and on a stone job it cannot be adjusted afterwards without taking the work down.

Yes. At 1.5-2.5% (moderate) water absorption and 2300 kg/m³ density it is exterior grade. Use a breathable impregnating sealer outdoors, never a film-forming one, and expect the stone to darken when wet — normal, and it reverses as it dries.

Yes. We export worldwide from Bhilwara with container loading, export packing and documentation handled in-house. Minimum order is project-based rather than a fixed count. For bulk and wholesale enquiries, container quantities and repeat programmes, send the schedule and we will quote FOB or CIF against it.

Yes, and we would rather you did. Ask for a wet sample as well as a dry one — every stone darkens when wet, some dramatically, and it is the one thing a photograph cannot show you.

Impregnating sealer recommended Use a breathable impregnating sealer, never a film-forming one. A film traps moisture inside the stone, and in Indian conditions it eventually clouds and lifts, at which point it has to be stripped. An impregnating sealer sits in the pores and lets the stone dry out. Reapply at the manufacturer’s interval, typically every few years on an exposed elevation and less often on a sheltered one.