River Stone Vessel Sink 24"x12"x5.9" (61x31x15 cm) — RXL250919

Riverstone (River Stone) Vessel Sink — Hand-Carved Natural Volcanic Basalt — 61 x 31 x 15 cm (24 x 12 x 6 in) | RXL250919

The RXL250919 Riverstone vessel sink is a handcrafted piece, hand-carved from a single block of natural volcanic basalt quarried directly from the volcanic islands of Indonesia. Measuring 61 x 31 x 15 cm (24 x 12 x 6 in) and weighing 37.1 kg (82 lb), this XL countertop vessel sink is the ideal choice for luxury master en-suite bathrooms and grand architectural projects that call for a striking sculptural presence on the vanity top.

Because it is a natural rock formed millions of years ago as volcanic magma cooled, every 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 residential projects, boutique hotels and premium spas.

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 XL size, this combination of ruggedness and function reaches maximum visual impact — the piece transcends the idea of a "bathroom fixture" and becomes a true natural sculpture within the bathroom. Ideal for long master en-suite vanity tops, ultra-luxury powder rooms and architectural projects where the sink is the focal point of the composition.

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?

• Luxury Master En-Suites: The XL size is ideal for main suites with generous vanity tops — a piece that becomes the center of the architectural composition.
• Premium Powder Rooms: On the long vanity tops of high-end powder rooms, it creates an absolute focal point that impresses every guest.
• Boutique Hotels and Resorts: Sets presidential suite bathrooms apart with a unique, memorable and photogenic handcrafted piece.
• Premium Spas and Aesthetic Clinics: Conveys an elevated sensory experience of connection with nature from the very first touch.
• Signature architectural projects: The XL size balances long vanity tops in double en-suite bathrooms or large-scale bathrooms.
• High-end luxury residences: For clients who want absolute exclusivity — there is no other identical sink anywhere in the world.

Which faucet pairs with this XL sink?

For an XL sink in dark basalt, the faucet needs height and presence in proportion to the scale of the piece:

• Tall, robust high-arc faucet (recommended): Minimum height of 30 cm (12 in) — in proportion to the sink's imposing size, with the right flow and no splashing.
• Wall-mounted faucet with a long spout: An excellent option for XL sinks — a sculptural look that highlights the presence of the stone on the vanity top.
• Ideal finishes for dark basalt: Aged bronze, matte black or copper — they create a sophisticated, timeless 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 XL 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 Riverstone XL 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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