lepidolite
Concise Oxford English Dictionary © 2008 Oxford University Press:
lepidolite /ˈlɛpɪdəlʌɪt, lɪˈpɪdəlʌɪt/
▶noun a mineral of the mica group containing lithium, typically grey or lilac in colour.
'lepidolite' also found in these Oxford entries:

