'Chert, a hard, dense sedimentary rock, is called jasper if it's brightly colored, & this if it's dark'
flint
ROCK: Chert, a hard, dense sedimentary rock, is called jasper if its brightly colored, & this if its dark
Chert, a hard, dense sedimentary rock, is called jasper if it's brightly colored, & this if it's dark
Chert, a hard, dense sedimentary rock, is called jasper if it's brightly colored, & this if it's dark
ROCK
flint
ROCK