Crystal wine glasses are created from glass that holds lead oxide. Lead oxide is added to the glass to increase the density and when the density is increased, the glass becomes more reflective and shinier. Crystal wine glasses often reflect a brilliant array of color.

Crystal wine glasses are heavier than glass wine glasses since of the lead content. The number of colors that are reflected from the glass really depends on the number of lead that is added to it. The amount of oxide lead added to the piece determines the weight of the crystal.