1.5-2"
Random pull 
Your piece will be (if not the exact picture) quite similar!
 
Ordinary yet extraordinary, colorful and clear, Quartz crystals are the most common and abundant in the world, comprising the largest and most diverse family in the mineral kingdom. "From ancient times to the present day, quartz crystals have been a source of Light to mankind. Highly valued by spiritual leaders and healers as well as scientists, the unique attributes of quartz have played a key role in mankind' evolutionary development." 
 
Please see our Crystal Lore Section for more info on this amazing stone!