Jr. Statesman Rollerball Pen Kits - the barrels were made from branches that were on a large Cholla Cactus plant that is in my yard - the dead branches dry out naturally in the sun & weather. I crushed Turquoise Tru-Stone into small nugget pieces & filled all the natural openings in the Cholla cactus by individually stacking the nugget pieces to insure there would be no voids. I used thick Parfix CA to bond the nuggets and thin CA to build up for the final finish - wet sanded & buff polished.