Notes from Skylark Exports on mineral grades, applications, and what to include in an export inquiry. https://skylarkexports.com/blog en https://skylarkexports.com/blog/what-an-export-inquiry-should-includehttps://skylarkexports.com/blog/what-an-export-inquiry-should-includeFri, 02 Oct 2026 00:00:00 GMTWhat to include in a mineral export inquiry: the product, the spec limits, the packing, your destination port, and the quantity, so a quote can match the plant.https://skylarkexports.com/blog/which-clay-a-coating-line-needshttps://skylarkexports.com/blog/which-clay-a-coating-line-needsWed, 09 Sep 2026 00:00:00 GMTHydrous kaolin against calcined kaolin for coatings, paper, rubber, and plastics, and when brightness, opacity, and hardness mean raw clay is not enough.https://skylarkexports.com/blog/how-buyers-compare-silica-sand-gradeshttps://skylarkexports.com/blog/how-buyers-compare-silica-sand-gradesTue, 18 Aug 2026 00:00:00 GMTHow buyers compare silica sand grades by mesh or AFS grain, iron as Fe2O3, and moisture, and which of the three moves a glass, foundry, or ceramic purchase.