There are currently 6 glossaries in this directory beginning with the letter O.
Earrings with a clip back style in the form of the Latin letter omega.
A traditionally black gemstone used to celebrate the 7th wedding anniversary.
Op Art or Optical Art
An abstract art that uses precise, hard-edged patterns in strong colours and make the images appear to move.
This gemstone is believed to reflect the colors of all other gemstones. Opal is the birthstone for October and the traditional gift for the 14th wedding anniversary.
Open back setting - a setting in which the back of the stone can be seen.Palette
The surface on which a painter will mix his colours. Also the range of colours used by an artist.
A stone with an elongated round shape. This cut is popular for color gemstones.