The listing is for three (3) item / The Cost of three (3) item.

The size of the stone about 1,4" - 1,2" (35x30 mm). Knob height - 1,8" ( 45 mm)

Each knob is original and unique. All knobs are handmade.

Gemstone on each knob an original nugget. Two identical gemstones aren't in the nature 

On this knob - Large Amethyst crystal

Stones are very reliably fixed. It is possible to pull for handles and to tear off-close doors in which they are established many times.   

The base is made of aluminum, with a standard carving under the fixing screw. (the screw in a set) the Base of the handle and a part of a stone are covered with a layer of galvanic copper. Copper is covered with patina (on photo) or nickel.
 
It is a beautiful gemstone knobs could be used as a cabinet Knobs, kitchen knobs, dresser knobs, bathroom knobs,  casket knobs, jewelry box, and much more.