bertrandite
Noun
Meaning
bertrandite (uncountable)
(mineralogy) A basic beryllium sorosilicate that is an ore of beryllium.
Synonyms
halite
olivenite
wulfenite
scheelite
vanadinite
stibnite
epidote
colemanite
libethenite
crocoite
ulexite
boracite
priceite
pandermite
tyrolite