
Cut is the most important and dramatic of the factors defining a diamond's value and refers to the angles and proportions the diamond cutter has employed in fashioning the facets which turn a dull rough diamond into a sparkling, bright polished gem. The better the cut, the more the diamond appears to sparkle and scintillate.
Colour refers to the degree to which a diamond appears colourless. Diamonds are graded on a colour scale established by the Gemmological Institute of America (GIA) which ranges from D (colourless) to Z (light yellow).
Diamonds which have tinges of yellow are more common than colourless diamonds and as such are less valuable than colourless diamonds. Completely colourless diamonds are graded "D" and are treasured for their rarity. As such they are extremely valuable. The Australian market has all colours available, however the most common and best value are from F to G.


The size, nature, location, and amount of inclusions determine a diamond's clarity and subsequently affect its value. A diamond's unique inclusions were bestowed by nature when the diamond was formed millions of years ago deep beneath the earth's surface.

Another important factor defining the value of a diamond is that each diamond has already been sent to the worlds most internationally recognised and respected independent gemmological trade laboratory, for identification and grading.