BEZILLO Onyx is a extra clear thixot ropic solid Glue specially formulated with medium viscosity used to glue, repair and fix onyx & crystal based marbles and other natural stone both in vertical & horizontal applications. ONYX is very easy to use due to it knife grade technology. The cured mastic is easily polishable and sandable. It has an excellent adhesion; low shrinkage and the reactivity is very good even in cold conditions.