Definition of forsterite in English:



  • A magnesium-rich variety of olivine, occurring as white, yellow, or green crystals.

    • ‘The specimen is completely composed by crystals of forsterite and the largest is almost 2 cm.’
    • ‘One of these crystals is the bright green-colored gem called forsterite.’
    • ‘On the other hand, synthetic fibrous-like forsterite is less expensive to prepare than Kaowool or rockwool.’
    • ‘Peridot, the green gem variety of forsterite, occurs on a fairly remote basalt-capped mesa near the southwest edge of South Park.’
    • ‘It has been found that the fraction of crystalline forsterite converted into the amorphous form is a function of the energy deposited through elastic collisions by incoming ions.’
    • ‘Egypt is also the home of some of the best peridot, the gem variety of forsterite.’
    • ‘The occurrence is in deformed, silicified marble accompanied by forsterite, diopside, zcolites, scapolite, and pyrite.’
    • ‘Our results should furthermore be useful to build up an analytic expression for the index of refraction of chromium forsterite.’
    • ‘Among the features, the silicate features from minerals like forsterite and enstatite ‘swamp’ the other features, ‘so our first job will be to understand’ the abundances of the silicates.’
    • ‘Consequently, the oxide mixture seems to be widely accepted as the post-spinel phase of forsterite.’
    • ‘These include aquamarine, chrome diopside, diamond, jade, labradorite, forsterite, opal, pyrope, variscite, and many unique agates and jaspers.’


Early 19th century: from the name of J. R. Forster (1729–98), German naturalist, + -ite.