Thank you for submitting your items for appraisal. This appears to be a group of modern replica glass from Syria. You might have read that ancient glass iridescence is caused by corrosion or weathering on the surface ( the changing of colours is due to the refraction of light within layers of weathered glass). In contrast the imitated "iridescence" on the vases in your possession is simply painted on with a brush or sprayed on ( the small black dots). Such replica sell in the price range from 5 to 50 USD each. As you have already mentioned, without a provenance ancient artifacts can´t be sold, you would violate Protection of Cultural Relics laws. Replica correctly described as replica would be legal to sell, but as this group of glassware was patinated to deceive the buyer, I would consider the items forgeries of no value, unfortunately. They might represent a high sentimental value to you, but the market value would be rather low. I hope I was able to explain this complicated matter to you.