• June 01. 2026

Quick Answer No independent body certifies commercial marble grades. Premium, Select, Standard, Commercial, A grade and first grade are all defined by whoever is selling the stone, and a grade letter carries information only when the criteria behind it and the shipment it covers are written down. Commercial grades describe a supplier's own selection within one marble variety and one price range. A...

• September 18. 2026

Quick Answer Resin in a marble slab is a statement about what the stone needed, not about what the stone is worth. On many marbles, filling is the normal way the material is made usable at all, and the presence of resin says less about quality than which marble you are looking at. The question that does work is whether the fill matches the material rather than how much of it there is, and the marb...