Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
alasta
adjective. of marble, marble
alas
noun. marble
A noun appearing as ᴱQ. alas (alast-) “marble” in the Qenya Lexicon of the 1910s derived from primitive ᴱ✶ʒalast- (QL/30).
Neo-Quenya: I think this word may be salvageable in Neo-Quenya as ᴺQ. alas, reconceived as a derivative of ᴹ√GALAS “joy, be glad”, perhaps from ᴺ✶galast- originally with the sense “thing pleasant to touch”.
rista-
verb. to plant
A verb in the Qenya Lexicon of the 1910s glossed “plant” under the early root ᴱ√RIẎI “scatter” (QL/80).
A word in the Qenya Lexicon of the 1910s given as ᴱQ. alasta “of marble, marble”, an adjectival form of ᴱQ. alas (alast-) “marble” (QL/30).
Neo-Quenya: I think it might likewise be used in Neo-Quenya as ᴺQ. alasta, an adjectival form of ᴺQ. alas “marble”.