Help ID this Bakelite necklace and earring set please

Hi all,

I recently found this set at a flea market and wanted to know how you'd date it? It's Bakelite (creamed spinach?) and the necklace metal is brass (?) I imagine. The Bakelite has been hand 'faceted' as the faceting is uneven, and the pendant is attached using a small metal post that sticks into the top of it. I've tried to show the details as best as I can. Thanks very much, would appreciate any info anyone might have!