Which small, intrusive igneous rock bodies often contain gem-quality crystals of minerals such as beryl, spodumene, and tourmaline and high concentrations of relatively rare elements such as lithium, boron, and beryllium?
(intrusive igneous rock bodies; contain; gem-quality crystals of minerals such as beryl, spodumene, and tourmaline and high concentrations of relatively rare elements such as lithium, boron, and beryllium; T:often)
intrusive igneous rock bodies
contain
gem-quality crystals of minerals such as beryl, spodumene, and tourmaline and high concentrations of relatively rare elements such as lithium, boron, and beryllium T:often