Abstract: A decorative glass ornament may be formed from glass material and then caused to crack to produce an effect similar to that exhibited by naturally-occurring quartz: the glass is cracked or veined in random patterns. Glass material is heated and molded into a desired shape, and then, prior to substantial cooling, is dipped in a liquid medium having a lower temperature, causing cracks to form. Alternatively, a pre-shaped glass crystal may be caused to crack to produce a decorative ornament displaying similar effects. Epoxy paint may be applied to the ornaments after they have cracked, to produce additional visual effects.