Are these glass scent bottles usable?

Most antique scent bottles retain their original stoppers and remain functional for modern use. Check the ground glass neck and stopper for any chips that might compromise a secure fit. Exercise caution with older bottles containing residual perfume oils, as prolonged contact can occasionally affect the interior glass surface.

How can I date blue cut glass?

Examine the style of the cutting, the shape of the object, and any accompanying metal mounts or hallmarks. Victorian pieces often feature heavier, ornate silver mounts and deep floral or geometric cutting. Art Deco examples from the 1920s and 1930s typically display streamlined geometric forms paired with guilloche enamel and starker facet patterns.

What is Bohemian overlay glass?

Bohemian overlay glass consists of a clear or contrasting glass body encased in one or more layers of coloured glass. Artisans cut through the outer layers to create complex patterns of contrasting colour. This technique was widely used in Central Europe during the nineteenth century to produce highly decorative vases, goblets, and decanters.