This is an incredibly clear quartz crystal which can be rare to find. That's why clearer quartz crystals are usually seen as more valuable than the less clear pieces.  Clear quartz crystal is a natural form of silicon dioxide which is also known as silica.  Quartz is found all over the world and some of the largest pieces of quartz crystal found have weighed up to 14,000 pounds.  Clear quartz has many healing properties including balancing and purifying energy.  It's also known to help connect us with our own intuition or inner voice and it can help you unlock memories.