Tourmaline pegmatite
Part of Hall of Planet Earth.
On Tuesday, October 20, the Museum will close at 3 pm, and the Hall of Ocean Life will be closed all day.
Part of Hall of Planet Earth.
The large groups of pink crystals of the boron-bearing mineral tourmaline and the tiny purple crystals of the lithium-bearing mineral lepidolite grew from a melt consisting of lithium, boron, and water-rich silicate.
AMNH collection