Granite bathtub Flumen

Granite Bathtubs

Granite Bathtubs – Solid River Stone Tubs for Indoor and Outdoor Use

Granite bathtubs, also known as river stone or river boulder bathtubs, are the most durable natural stone bathtubs available. Handcrafted in Indonesia from extremely hard volcanic boulders, each granite bathtub is carved from a single solid block of stone, without glue, fillers or artificial coatings.
For over 20 years, Lux4home™ has specialized in manufacturing freestanding granite bathtubs for hotels, spas, architects and private clients worldwide. Thanks to their exceptional density, low porosity and resistance to mechanical damage, granite bathtubs are suitable for both indoor bathrooms and outdoor installations, including spa gardens and wellness terraces.

Why Choose Granite Bathtubs from Lux4home™

Extreme durability and density
Granite is one of the hardest natural stones used for bathtubs. Its high density and low water absorption make granite bathtubs resistant to cracking, erosion and mechanical damage, even under intensive daily use in hotels and spas.
Indoor and outdoor performance
Unlike marble or onyx, granite bathtubs tolerate UV exposure, temperature changes and moisture very well. This makes them ideal for outdoor bathtubs, garden spas and wellness areas exposed to weather conditions.
Single block construction
Every granite bathtub is carved from one complete boulder. We never assemble, glue or repair stone internally. Boulders with micro cracks or structural weaknesses are rejected before production.
Natural thermal mass
Although granite feels cool initially, it absorbs heat quickly and retains it for a long time. This allows for extended soaking sessions with stable water temperature, especially appreciated in spa environments.
Proven in commercial projects
Lux4home™ granite bathtubs are used in more than 200 hotels and resorts across over 50 countries. They are designed for high frequency use, heavy water load and long term reliability.

Granite Bathtubs – Technical Characteristics

Stone type: Natural granite / river stone / volcanic boulder
Production method: Hand carved from a single solid block
Surface options: Polished interior, honed, raw or hammered exterior
Typical weight: 600–1200 kg depending on size and wall thickness
Water resistance: Very low porosity, highly resistant to absorption
Suitable use: Indoor bathrooms, outdoor spas, hotel wellness zones
Granite bathtubs are often chosen where marble or onyx would be technically unsuitable due to climate, frequency of use or exposure to environmental factors.

Custom Granite Bathtub Manufacturing

In addition to our standard models, we manufacture fully customized granite bathtubs based on architectural drawings or design concepts.
Available options:
Length: 120–280 cm
Width: 60–150 cm
Height: 50–90 cm
Shapes: Oval, rectangular, round, organic boulder forms
Drain placement: Center, offset or custom
Features: Integrated steps, seating areas, deep soaking zones
Each granite bathtub is inspected, photographed and approved before packing. We also offer selected granite bathtubs in stock for faster delivery.

Granite vs Marble and Onyx Bathtubs


Granite bathtubs differ significantly from marble and onyx:
Granite is harder and more impact resistant than marble
Granite is less sensitive to chemicals and water absorption
Granite is suitable for outdoor installations

• Marble is recommended mainly for indoor use
• Onyx is a semi-precious stone focused on aesthetics and translucency

For clients seeking maximum durability and minimal maintenance, granite bathtubs are often the best technical choice

Granite Bathtubs FAQ

Why Choose Lux4home™ Stone Sinks

Each sink is handcrafted by Indonesian artisans with over 30 years of experience.
Multi-stage quality control ensures perfect durability and no micro-cracks.
European-registered company with full legal accountability and a 2-year international warranty.
Trusted by 203+ hotels and thousands of private clients in 57 countries.

Custom Stone Sink Production

Need a unique size, shape, or material?
We produce custom-made stone sinks tailored to any project – from private bathrooms to large hospitality developments.

FAQ