What sizes and thicknesses of Giallo Siena marble are there?
We hold 15, 18 and 20 mm as standard stock.
Sizes and formats, and what is held

Yes. The published minimum cut thickness for Giallo Siena marble is 10 mm, and it is reached after vacuum resin treatment. In the wider trade the thicknesses most commonly supplied are 18, 20 and 30 mm; we hold 15, 18 and 20 mm.
| Thickness | Status | Source |
|---|---|---|
| 10 mm minimum | Published minimum after vacuum resin treatment | Published block and slab characteristics |
| 15 mm | Held as our standard stock | Our own stock statement |
| 18 mm | Held as our standard stock | Our own stock statement |
| 20 mm | Held as our standard stock | Our own stock statement |
| 30 mm | Commonly supplied in the wider trade | Trade listings, indicative only |
The stone is a brecciated calcitic marble, and blocks are recommended to undergo vacuum resin treatment before sawing so the small cracks and holes are closed. That treatment is what makes a thin cut possible, and it is why the published minimum is stated after treatment rather than as a property of the rock.
What these figures are, and what they are not A minimum cut thickness is a property of the material after treatment. It is not a statement that a 10 mm panel is the right product for a given job — substrate, span and handling decide that.
We hold 15, 18 and 20 mm as standard stock.
40.65 kg per square metre at 15 mm, 48.78 kg at 18 mm and 54.20 kg at 20 mm, at the published apparent density of 2710 kg/m³.
This answer sits on the Sizes and formats, and what is held page, with the rest of the questions about it.
Sizes and formatsA thickness, a format, a finish, a quantity and a destination will get you a quotation for Giallo Siena marble.
Can Giallo Siena marble be cut thinner than 20 mm?