different between ureilite vs ursilite

English

From Russian ??????? (urejlit), named after the Mordovian village of Novy Urey, where a meteorite of this type fell on 4 September 1886.

ureilite (plural ureilites)

An achondrite composed mostly of olivine and clinobronzite with some diamond or graphite.

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

? + -ite

ursilite

(mineralogy) An orthorhombic mineral containing calcium, hydrogen, magnesium, oxygen, silicon, and uranium.

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