It isn t a surprise that granite emits radiation.
Is decomposed granite radioactive.
When granite erodes and endures weathering over time it easily starts flaking and crumbling away from its parent source.
Decomposed granite is the completely natural derivative of granite.
So do other items in our households.
The radioactivity of granite as a matter of fact has led to much confusion on the part of week end prospectors.
This decomposed granite crumbles into various sizes of particles and can be further crushed and screened to specific sizes for different project needs.
It forms as a result of magma cooling over millions of years under intense pressure and heat.
Granite like any other stone may contain veins of naturally occurring radioactive elements like uranium thorium and their radioactive decay products.
Granite is the most abundant type of natural stone in the world.
Granite contains radioactive materials.
Prowling the hills with a geiger counter an amateur prospector is apt to be elated when he gets a high count form a body of granite or decomposed granite.
Further weathering produces rock that easily crumbles into mixtures of gravel sized particles sand and silt sized particles with some clay eventually the gravel may break down to produce a mixture of silica sand silt particles and clay.
These trace concentrations may vary from stone to stone or even within a single slab of granite.
The amount of radiation emitted from granite can vary depending on the natural uranium and or thorium concentration.