Origin: Northern Mexico Description: This can be challenging to work with because the fire layer is so thin. My recommendation is to use diamond burrs in the 150 and 220g range. then move over to the rubber abrasive wheels and smooth the surface. the rubber abrasive works incredibly well on agate. I can not guarantee how much fire will be in each rock, but there will be fire in all these stones. Fire Agate is a powerful protection stone. Gives you courage and strength. Enhances your creativity and mental agility. Promotes inner stability and self-confidence. Helps heal insect bites, reduces fevers, and increases metabolism. Chemical Composition: SiO2Grade: Semi PreciousAppearance: Translucent/ Opaque Inclusions: Minimal cracks Cost per Gram: $0.80/gSize approximately 1 pc: 7cm x 6cm x 3cmWeight approximately 1 pc: 150g Rough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.