Most hen on nest dishes have one hen. A small number of clear glass examples have two — facing each other, beak to beak, sharing a single woven-basket nest. It's rare enough that a piece sold this year carried no maker attribution at all in the listing, just "unusual." That's actually the tell: when an experienced seller can't confidently name who made something, it usually means the piece is genuinely scarce rather than simply unfamiliar to one person.

What to look for: two full hen figures (not one hen plus a chick or a rooster companion piece, which is a different and more common variant), a single continuous nest base, and check both beaks and both tail tips for chips — twice the fragile points of a standard single hen.

Fenton made hen on nest dishes across dozens of colors and finishes over decades, and purple slag — streaky purple-and-white marbled glass, distinct from solid milk white — is one of the scarcer ones. A large example sold this year after 34 competing bids, which tells you the demand was real and contested, not a single lucky buyer overpaying.

What to look for: the marbling should run through the glass, not sit on the surface — if you can feel texture where the color changes, it's likely painted rather than genuine slag. Fenton didn't permanently mark glass with its oval logo until 1970, so an unmarked piece isn't automatically a red flag on this maker specifically.

Vaseline glass hens incorporate trace uranium dioxide in the glass formula, which gives them a pale yellow-green color in daylight and an intense neon-green glow under UV light. What makes this category consistently strong is that it pulls buyers from two separate collector worlds at once — people who collect hen on nest dishes, and a completely separate community that collects uranium/vaseline glass in any form. That overlap in demand is why these tend to sell above what the form alone would predict.

What to look for: confirm it under a 365–395nm UV blacklight in a dark room — genuine vaseline glass fluoresces an unmistakable bright green. This is a fast, reliable, nearly foolproof test you can do with a $10 blacklight before you buy.

Slag glass gets its swirled, marbled look from hand-blending two colors of molten glass moments before pressing — commonly a milk-white base swirled with blue, purple, or amber. Because the swirl happens by hand and by eye, no two pieces come out identical, which is a genuinely rare thing to be able to say about mass-produced pressed glass. Challinor, Taylor & Co. pioneered the technique in the U.S. in the late 1800s; Boyd, Degenhart, and Mosser carried it forward through the 20th century.

What to look for: collectors generally rate an even, balanced swirl between the two colors higher than a piece that's mostly one color with just a hint of the second.

Indiana Glass sold hen on nest dishes through direct-sales gift lines like Tiara Exclusives — the same imprint behind pieces like our own Tiara Honey Bee box. A common colorway that would otherwise sell for very little jumps meaningfully in value if it still has its original retail box and paperwork intact. Ephemera collectors and glass collectors both want it, for different reasons, and that's two buyer pools bidding on one object.

What to look for: the box and any printed insert card, not just the dish. A pristine dish with no packaging is worth a fraction of the same dish with its original box.