The trustone material is a patented process whereby authentic turquoise was pulverized, then reformed with high quality resins to make it workable on a wood lathe. This mixture was combined with 24kt gold and veined before hardening. It is incredibly beautiful and each piece is entirely unique in the gold veining. Pen comes in a hard case (included in price)."Customization" involves bundling to make a set, no engraving available. Perfect gift for holidays, birthdays, and any special occasion. This item is made of turquoise and gold, rhodium, truestone, engineered stone, unique materials, platinum, iridium nib.