The Ray-Bans don't look terribly fake. Try gently scratching the Ray-Ban logo off with your fingernail. If it easily comes off, fake and if not, possibly real.
How do the hinges feel? Tight and well-made? Look at the nose piece...is there an RB engraved in the metal? Is there a model number under the nose bridge?
Passed the fingernail test, but no nose piece engraving. (Can we add these to the lick test/ pinch test/ hermes logo intricacy test.?) Despite wearing glasses every day for 7+ years, not sure what 'quality' glasses feel like. Based of the slight flimsyness I'm erring on the side of fake though.
Yup, not grenadine. This would have been the perfect opportunity for a brianpore lmgtfy though- T&A's site still has them up. Called 'lace weave' apparently.
I'm going to try my luck selling this one as it has a fuzzy/worn patch (as hikari says, pretty fragile). The other identical one I'm keeping for myself .