Qoryaha qurxoon, oo sidoo kale loo yaqaan alwaax-qurxinta, ayaa inta badan lagu dahaadhay alwaax adag oo qurxoon, sida geedkii cas, dambas, geed cad, bjørk, maple, teak, sapele, cherry, beech, walnut iyo wixii la mid ah.
Geedka cas (fasalka: AAA/AAA, BB/BB, A/B, B/C, c/c) alwaax qurxoon, dambas dabiici ah, beech cas, geed cad (Q/C), beech cas, bubinga, sapele (C) /C), tii dabiiciga ah (C/C), iwm.
Geedka cas (c/c) alwaax qurxoon, dambas dabiici ah, beech cas, geed cad (Q/C), beech cas, bubinga, sapele (C/C), tii dabiiciga ah (C/C), iwm.