It sounds like you found something intriguing! Based on your description — glass mushroom shape, velvet-lined box, and a metal connector at the bottom — here’s a breakdown of possibilities:
1️⃣ Antique Electrical Component
- The metal connector suggests it might be part of a vintage electrical or vacuum tube device.
- Some old radios, amplifiers, or lab equipment used glass vacuum tubes shaped in unique ways, sometimes resembling mushrooms.
2️⃣ Decorative Bottle or Perfume Atomizer
- Some collectible perfume bottles or scent diffusers from the early-mid 20th century had glass tops shaped like mushrooms and metal fittings for pumps or stoppers.
- The velvet box fits the presentation style of luxury perfumes.
3️⃣ Scientific or Laboratory Equipment
- Could be a specialized lab glass attachment, like a stopper or connector for a vacuum system.
- Mushroom-shaped glass often appears in gas collection, pressure, or vacuum apparatus.
4️⃣ Novelty or Art Piece
- Estate sales sometimes include art glass or novelty items that mimic industrial parts but aren’t functional.
- The metal connector may have been added for display, lamp conversion, or mounting.
Next Steps to Identify It
- Look for markings on the glass or metal — numbers, letters, or brand logos can narrow it down.
- Check the metal connector — is it threaded, hollow, or electrical?
- Compare online — sites like eBay, Etsy, or collector forums for vacuum tubes, lab glass, or vintage perfume bottles.
- Ask a local antiques expert — sometimes estate sale finds are unique pieces that only specialists recognize.
If you can, send a photo of the piece from multiple angles. That would make it much easier to narrow down exactly what this glass mushroom thing is and what it was used for.
Do you want to do that?