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                  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Diffusion:

Diffusion is the procedure of color enhancing a stone by heating the stone in the attendance of iron oxide, chrome oxide or may be similar compounds. The process colors the stone by infusing the exterior surface of the stone with color. It is only functional to cut stones as any further cutting will remove the color enhancement.

 

Domed:

A convex shape like the outside of a ball or sphere. This shape is frequently used in earrings, pendants and also components of jewelry designs.

 

Dull:

The term used to explain gems which exhibit an earthy or dull luster, sense their surface does not reflect light very well.

 

Diamond:

Diamonds exhibit fluorescence of a variety of colors under long wave ultra-violet light, but generally bluish-white, yellowish and greenish fluorescence under X-rays. Diamonds had a violet absorption spectrum at 415.4 nm. Colored stones normally show additional violet bands.