Technical guides · 2 min read

How to Read a Stone Quote: A Practical Guide for Architects and Designers

When you receive a stone quote, it can feel like a maze of numbers, abbreviations, and technical jargon. This guide breaks down every element you’ll encounter—from the way slabs are measured and priced, to the nuances of finishes, transport terms, and payment conditions. By the end, you’ll be able to compare offers confidently, spot hidden costs, and ensure the final product meets your project’s specifications.

Units of Measurement and Quantities

Stone quotes typically list quantities in square metres (m²), individual pieces, or full slabs. A slab is a single, continuous piece of stone, often 2.5–3 m long and 1–1.5 m wide. When a quote lists m², it refers to the net surface area after cutting. Pieces are used for irregular shapes or when a slab cannot be delivered whole. Always confirm the dimensions of each slab or piece, as variations in length or width can affect the total area and cost.

Unit Prices and Total Cost

Unit prices are usually expressed per square metre or per slab. The quote should separate the base price from any additional charges such as finishing, edge profiling, or custom cuts. Multiply the unit price by the quoted quantity to verify the subtotal. Check for any hidden fees—transport, handling, or packaging—that may be listed separately.

Finish, Thickness, and Edge Profiles

Finish options (polished, honed, brushed, etc.) can change the price by 10–30 %. Thickness is critical: standard slabs range from 20 mm to 30 mm for indoor use, while 35–40 mm is common for high‑traffic areas. Edge profiles (beveled, bullnose, ogee) also add cost. Ensure the quote specifies the exact finish, thickness, and edge type for each slab or piece.

Crates, Packing, and Transport Terms

Crates are the protective boxes that keep slabs intact during shipping. The quote should state the number of crates, crate dimensions, and whether the slabs are double‑crated for extra protection. Transport terms are usually expressed as Incoterms (e.g., FOB, CIF, DAP). The Incoterm determines who pays for freight, insurance, and customs duties. Verify that the quoted price includes all transport costs up to the delivery point.

VAT, Taxes, and Validity

In Italy, VAT is typically 22 %. Quotes often exclude VAT, so you must add it to the final amount. The quote should state the VAT exclusion explicitly. Validity refers to the period during which the quoted prices remain unchanged—usually 30–60 days. If you need more time, negotiate an extension or a price lock.

Deposit, Payment Schedule, and Acceptance Process

Most suppliers require a deposit (often 30–50 %) before cutting begins. The quote should outline the payment schedule: deposit, progress payments, and final payment upon delivery. Acceptance is usually formalised by a signed delivery note or a simple email confirmation. Make sure the acceptance criteria (e.g., visual inspection, dimensional checks) are clearly defined.

Photos of Slabs and Quality Assurance

A reliable quote will include high‑resolution photos of each slab, showing colour, veining, and any natural defects. These images help you verify that the stone matches your design intent. Additionally, the quote should reference the stone’s quality grade (e.g., A, B, C) and any certification or test reports, without inventing specific values. Typical ranges for compressive strength, porosity, and water absorption are provided by the quarry, not the supplier.

Glossary

A — Grade A: Highest quality, minimal veining and defects. B — Grade B: Good quality, moderate veining. C — Grade C: Lower quality, more veining and defects. Incoterm — International commercial terms defining responsibilities of buyer and seller. VAT — Value Added Tax, a consumption tax applied to goods and services.

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