How do you tell if a piece is authentic milk glass?

- Color: Authentic milk glass should be a pearly, opaque white color.

- Texture: Milk glass should feel smooth and slightly satiny to the touch.

- Weight: Authentic milk glass is usually relatively heavy for its size.

- Mold seams: Look for visible mold seams on the piece, which are a sign of handmade production.

- Pontil: Many pieces of milk glass made before the early 1900s will have a pontil mark on the bottom, which is the result of the process of removing the piece from the mold.

- Earpiece: Another feature that can indicate the authenticity of milk glass is the presence of an earpiece, which is a small projection of glass on one side of the interior.

- Decoration: Authentic milk glass is often decorated with raised patterns or designs. The designs on authentic milk glass are typically crisp and well-defined.

- Fluorescence: A UV (ultraviolet) light can reveal how many minerals exist in the milk glass. It must appear as a "white or opaque" fluorescent color under blacklight to pass.

- Manufacturer markings: Look for marks or stamps on the bottom of the item, which indicate the manufacturer.

- Provenance: Obtaining the provenance of the piece can help authenticate its authenticity. Authenticated milk glass pieces will have a documented history that tracks its origins and ownership over time.