What's the difference between moonseed and moonstone?

Moonseed

Definition:

(n.) A climbing plant of the genus Menispermum; -- so called from the crescentlike form of the seeds.

Example Sentences:

Definition:

(n.) A nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. It is used as a gem. The best specimens come from Ceylon.

Example Sentences:

(1) In December this year the BBC is doing a three-part adaptation of Wilkie Collins's The Moonstone.
(2) My 10 Victorian novels that are as good as, or better than, anything Dickens wrote: Middlemarch, George Eliot Vanity Fair, William Makepeace Thackeray The Way We Live Now, Anthony Trollope The Mayor of Casterbridge, Thomas Hardy Wuthering Heights, Emily Bronte Jane Eyre, Charlotte Bronte The Moonstone, Wilkie Collins Treasure Island, Robert Louis Stevenson Portrait of a Lady, Henry James North and South, Elizabeth Gaskell • John Sutherland's The Dickens Dictionary (Icon, £9.99) is published tomorrow at 11.15am
(3) One newspaper noted sombrely that Jefferies had also conducted a lesson on the "Victorian murder novel", The Moonstone .