Crystal and Glass style doorknobs have been produced for centuries - and are still in production today. The bases of the glass are usually solid Brass and come in several finishes such as Polished Brass, Antique Brass, Oil Rubbed Bronze, Verdigris, Polished Chrome, Satin Nickel, Brushed Nickel and Copper. This guide outlines various styles (vintage and modern) and discusses what you need to know when searching for glass knob hardware.

Type

Most vintage style knobs use a door latch that uses a skeleton key - these latches are called Mortise style. The knobs attatch to one another using a spindle or threaded rod. Modern doors can be retrofited using a tubular style latch that will accommodate spindles, too. The crystal knobs can vary from round, fluted, octagonal to oval in shape. Color knobs, although less common, also can be found. Light green, Amthyst and Amber are the most common color of glass knobs.

Finish/Condition/Age

Finishes can vary from polished brass to oil rubbed bronze and everything in between. Vintage knobs will have more of a worn look and the brass will be faded or antique looking. The actual age is very difficult to determine. Old and new glass or crystal knobs can look indentical. Most knobs did not come with maker marks. Common acid solutions can be used to 'antique' the metal bases - so they can look old when in fact they are new. 

Installation

Most older glass knobs can be retrofit into modern doors - this will allow you to use more modern mechanisms while maintaining the vintage or antique exterior look. You can also mix and match styles or colors. Retrofit kits can be found from various sources including Copper Mountain Hardware or LookInTheAttic & Co. Glass doorknobs will enhance any the value and look of any home.