Sapphires form inside the fiery hearts of volcanoes, not deep in the mantle like we thought
When you purchase through contact on our site , we may earn an affiliate commission . Here ’s how it work . Brilliant - puritanic sapphire look like bits of sky bring down to Earth — but a Modern study finds these gemstones are from a different boundary : the one between the planet ’s crust and magma well up from the mantle , Earth ’s middle bed . Sapphires have been thought to work in the mantle itself or in the lower sections of the crust , study fourth-year authorAxel Schmitt , a geologist at Curtin University in Australia who conducted the body of work while at Heidelberg University in Germany , told Live Science ....