peridot

The emerald rainstorm contains a bright green mineral of a class called olivine—also known as peridot to us Earth-dwellers.

In the heart of it lies, like a dewdrop, a pale-green jewel called peridot.

Chrysolite (peridot, or olivine) was regarded in Shakespeare's time and earlier as of exceptional rarity.

It is appropriate to call the lighter coloured stones inclining to yellow chrysolite, and the darker green stones peridot.