River Stone Vessel Sink 22"x13"x6" (55x32x15 cm) — RL250955

Natural Stone Vessel Sink (Riverstone) — Natural Volcanic Basalt, Hand-Carved — 55 x 32 x 15 cm (22 x 13 x 6 in) | RL250955

The RL250955 Riverstone vessel sink is a handcrafted piece, hand-carved from a single block of natural volcanic basalt sourced directly from the volcanic islands of Indonesia. Measuring 55 x 32 x 15 cm (22 x 13 x 6 in) and weighing 27 kg (60 lb), this Large size countertop vessel sink is the ideal choice for en-suite bathrooms and projects that call for a more commanding presence of natural stone.

Because it is a natural rock formed millions of years ago by the cooling of volcanic magma, each piece is absolutely one of a kind — the variations in tone, shape and veining guarantee that no one else in the world owns a sink like yours. One of the natural stone sinks most specified by architects and interior designers for high-end projects.

Dual Finish — Organic Exterior and Polished Interior

What sets Marmer Butik Riverstone sinks apart is the contrast between two finishes that complement each other. The exterior preserves the raw, organic texture of the natural stone, keeping the wild, imposing look of the original basalt — every curve, every irregularity and every nuance of color tells the geological story of the rock. The interior goes through a high-precision polishing process, resulting in a surface that is smooth, satin and extremely easy to keep clean.

In the Large size (51 cm / 20 in), this combination of rustic character and functionality gains even more visual impact — the piece sits on the countertop with sculptural presence, becoming the centerpiece of the bathroom. Ideal for spacious master en-suite vanities where the sink can be appreciated in its full dimension.

Volcanic Basalt — The Power of Fire and Time

Basalt is an extrusive igneous rock, formed by the rapid cooling of volcanic magma at the earth's surface, at temperatures above 1,100 °C (2,000 °F). This volcanic birth results in one of the densest and most resistant stones on the planet, with extremely low porosity and lifelong durability.

Unlike mass-produced ceramic, porcelain or resin sinks, basalt does not fade, peel or crack with temperature changes, and it does not "age" in a negative way — on the contrary, natural stone gains character over time, becoming a true heirloom in your home.

Who is this sink for?

• Master En-Suite Bathroom: The Large size (51 cm / 20 in) is the best choice for the main suite — an imposing presence that raises the standard of the project.
• High-Impact Powder Room: On generous vanities, it creates a focal point that impresses every visitor.
• Guest Bathroom: When the project calls for more volume and personality in the choice of sink.
• Spas and Aesthetic Clinics: Conveys a sensory experience of connection with nature from the very first touch.
• Boutique Hotels and Inns: Sets premium suite bathrooms apart with a unique, memorable handcrafted piece.
• High-End Architecture Projects: The 51 cm (20 in) size creates perfect visual balance on double en-suite vanities.

Which Faucet Pairs with This Sink?

For a Large sink in dark basalt, the faucet needs height and presence in proportion to the piece:

• Tall-spout faucet (recommended): Minimum height of 25 cm (9.8 in) — in proportion to the size of the sink, and ensures a splash-free flow.
• Wall-mounted faucet: An excellent option for spacious vanities — a clean, sophisticated look that enhances the stone.
• Ideal finishes for dark basalt: Aged bronze, matte black or copper — they create a sophisticated contrast with the dark tone.

Marmer Butik offers a complete line of bathroom faucets and fixtures designed to pair with natural stone sinks. See compatible faucets →

How to Care for Your Riverstone Sink

• Daily cleaning: Soft cloth with water and mild soap — never use acids, bleach or abrasives.
• Dry after use: Avoid standing water to preserve the polished finish and prevent stains on the exterior.
• Annual sealing: Apply a sealer made for natural stone once a year.
• Avoid oily substances: Creams, oils and makeup can stain — wipe them off immediately.
• Do not use rough sponges: Choose soft cloths to avoid scratching the polished interior.
• Avoid strong impacts: Despite the high strength of basalt, heavy objects can cause cracks.

Marmer Butik tip: Apply a sealer made for natural stone once a year — it seals the micro-pores and keeps water gliding easily off the surface for decades.

Frequently asked questions about the Large Riverstone Sink

Marmer Butik, based in Londrina, Brazil, offers an exclusive collection of natural stone vessel sinks, Riverstone (river stone) sinks, travertine marble sinks, natural stone bathtubs, solid wood furniture and handcrafted decor pieces imported from the volcanic islands of Indonesia. Every product is individually selected for its quality, beauty and exclusivity.

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