Giallo Siena Platform Sovicille · Tuscany
Giallo Siena marble · Sovicille, Tuscany

The golden stone of Siena, at the price that scale makes possible.

Giallo Siena is a deep ochre-yellow marble with yellow veining and, in places, pale reddish patches. We buy it in volume and redistribute it: the purchasing scale is what makes the buying price work, and the buying price is what makes the selling price work.

See the sizes and formats Request a sample
Stock held
3000 m²in our own warehouse
Thickness held
15 mm · 18 mm · 20 mmstandard stock
Water absorption
0.04% to 0.12% (published values across sources)EN 13755-08
Apparent density
2710 kg/m³ (both published sources agree)EN 1936-07
Giallo Siena marble block
Giallo Siena marble — the golden ground with its yellow veining, photographed before cutting.
Our stock

What we hold, in our own warehouse

This material is held as slab, in three thicknesses, at sizes that are not one number but a band in two directions. A cut list is checked against the physical stock before it is priced, because a slab size is a band and not a fixed figure.

The 3,000 m² is a surface measure. How many slabs that represents depends on the dimensions of the pieces, so we do not quote a slab count against it.

Thickness held (mm)
15 mm · 18 mm · 20 mmBOSS, 2026-10-29 - our own stock statement
Slab length (mm)
1500 to 3200BOSS, 2026-10-29 - our own stock statement
Slab width (mm)
1200 to 2000BOSS, 2026-10-29 - our own stock statement
Stock area (m²)
3000BOSS, 2026-10-29 - our own stock statement
Weight per m²
15 mm: 40.65 kg/m² · 18 mm: 48.78 kg/m² · 20 mm: 54.20 kg/m² (nominal thickness, at the published 2710 kg/m³ apparent density)Derived from [S1] granitalsiena.com and [S6] StoneContact apparent density 2710 kg/m³ · calibration figure from [S16]
  • Thickness held: 15 mm, 18 mm and 20 mm.
  • Slab length: 1500 to 3200 mm. Slab width: 1200 to 2000 mm.
  • 3,000 m² held in our own warehouse.
  • Stock confirmed against the physical warehouse at the time of enquiry.
Sizes and formats
Before the first order

The trade facts

These are the figures a customs broker asks for before the first container. They are stated here so that they are not a question at the last minute.

HS classification

The classification of natural stone follows how far the stone has been worked, not the name of the stone and not the colour. A slab that has been sawn into a rectangular shape and a slab that has been polished and cut to size are declared under different lines, and the invoice carries the line that matches the goods that actually ship.

2515120000
Marble cut by sawing or otherwise into blocks or slabs of a rectangular (including square) shape — merely cut.
6802919000
Other worked marble and alabaster articles — polished, ground, chamfered, profiled or carved, and cut-to-size pieces.
6802911000
Marble, travertine and alabaster stone carvings.

How it travels

Slabs travel on edge, never flat. Each face is separated so polished surfaces do not rub against each other, the bundle is compressed and banded at high tension, and the whole closes into a heat-treated wooden crate carrying the ISPM-15 mark. Cut-to-size tiles go into cartons on a pallet. Custom pieces are crated on their own.

Where it goes from

Dispatch is from our processing base in the Shunde and Yunfu cluster, and the loading port is chosen against the shipping line. Terms are quoted FOB or CIF against the destination. The stone is quarried in Tuscany and the processing is done in China — two separate places, and we do not merge them.

A sample before the order

A sample piece is cut from the stock itself, so what arrives is the material that would be supplied rather than a photograph of it. Sample cost and carriage are quoted with the request.

How we work

How the price is made

We buy across many orders rather than one, and we pass the result on. Volume purchased sets the acquisition price; the acquisition price sets the supply price. What reaches you is the outcome of aggregated demand, handled in one chain — sourcing, processing and delivery held together rather than passed down through intermediaries.

The chain
Volume purchased → better acquisition price → better supply price → the buyer
01

Collected procurement across many orders, not a single block

02

Deep resource integration: sourcing, processing and delivery in one chain

03

The price advantage comes from the purchase, and is visible in the supply

04

Worldwide redistribution to trade customers

Specification

What the published record says

These are the figures published for the material, tested to EN standards. They are not a supplier's description of a block.

Test values attributed to the marble laboratory of the Politecnico di Torino. Where a figure is ours rather than published, it is marked as ours.

Water absorption
0.04% to 0.12% (published values across sources)EN 13755-08 water absorption at atmospheric pressure
Apparent density
2710 kg/m³ (both published sources agree)EN 1936-07
Open porosity
0.30% (mean) · 0.30 (standard deviation)EN 1936-07
Flexural strength
21.2 to 25.3 MPa (published values across sources)EN 12372-07 flexural strength in natural conditions
After 48 frost cycles
20.1 MPa (mean) · 6.0 (standard deviation)EN 12371-03 flexural strength exposed to 48 frost cycles
Compressive strength
89.4 to 175 MPa (published values across sources)EN 1926-07 uniaxial compressive strength
Slip resistance, honed
43 dry · 16 wetEN 14231-04 slip resistance, honed finishing
Full technical record
Sovicille (SI), Siena, Tuscany, Italy

Sovicille, in the province of Siena

The quarries sit in Tuscany, in the province whose city gave the stone its name. This yellow marble was laid in the Duomo di Siena and carried to the Reggia di Caserta; in the Veneto it appears in the Basilica di San Marco and in Teatro La Fenice. It formed in the Jurassic as calcareous sediment, and the pressure and heat of that period are what turned it into the compact rock you cut today.

Rock

Worked stone

Applications

One stone, ten places it goes. Every application below is a different set of thicknesses, formats and finishes — not a different colour.

Interior flooring Honed for grip; laid on a substrate sized for the span. Stairs and treads Thickness follows the rise, and the nosing profile is agreed before cutting. Kitchen worktops Sealed for a wet working surface; 20 mm and 30 mm for unsupported spans. Bathrooms and vanities Low absorption suits a humid room; honed where the floor is wet. Wall cladding Any finish reads well vertically; 10 mm panels need mechanical fixing. Tables and furniture Cut to size and edge-finished; matching across a set is decided at layout stage. Fireplaces and mantels Riven or honed for the surround; the hearth takes heat separately. Terraces, thresholds and sills External use; bush-hammered or sawn for grip on the walking surface.
All applications
Finishes

What this stone takes, and what it does not

A finish is not a preference, it is a decision with consequences: what the surface takes, how it wears, and how it behaves when it is wet. Each one below carries a verdict - whether it is a standard order on this stone, whether it depends on the block, or whether it is not available here at all.

The full finish dictionary

Polished

A standard order on this stone

A mirror surface. The golden ground reads deeper and the veining gains contrast; reflections of a lit room are the strongest on this stone.

Honed

A standard order on this stone

Soft sheen. The colour reads truer than polished and the texture stays quiet, which is why it suits large floors where gloss would be busy.

Leathered

Possible — ask first

A muted sheen with a tactile grain. It reads as a matte stone with depth rather than a flat one.

Sawed (diamond saw)

A standard order on this stone

A low, directional texture. Unpolished, uncoated, and completely honest about being raw stone.

Natural split (rock face)

A standard order on this stone

A rugged, cleft surface with the stone's own bedding visible.

Brushed

Possible — ask first

A fine directional scratch pattern with a satin sheen.

Tools

Four tools that answer the questions a buyer actually has: what the stone looks like in a room, what a particular slab looks like up close, what a given area needs in pieces and weight, and what is available.

Room visualiser

Giallo Siena on a kitchen, a wall or a floor, under real light.

Open

Slab viewer

Individual blocks and slabs at full size, with their dimensions.

Open

Quantity and weight

A surface in, the pieces and the weight out, before you ask.

Open

Availability

What is on hand, by origin, thickness, finish and batch.

Open
Questions

The eight questions that come up first when this stone is specified.

All questions
Enquiries

Tell us the application, the size and the finish you need, and we will come back with what we can actually supply.

A thickness, a format, a finish, a quantity and a destination will get you a quotation.

Start an enquiry Sizes and formats