Fire Quartz

Fire Quartz
AKA Hematoid Quartz
The combination of quartz and hematite balances the body, mind and spirit
Boosts self esteem
Brings clarity and understanding to emotions
Powerful grounding crystal
Enhances focus and concentration. Helpful for those with ADD/ADHD
Calms anxiety and panic
Removes and transmutes negative energy 
From Madagascar
 
These are priced by weight and not necessarily by size.  You might see a hint of a golden color in some of them.  That would be some Golden Healer Quartz which formed with them.  Not many of them have that, but just wanted to mention it.