Arlington & Co. Hatton Garden – What is fluorescence in a diamond?

Fluorescence is a characteristic that makes some diamonds appear to change colour when they are exposed to ultra violet light that surrounds us every day in sunlight and the light produced by fluorescent light bulbs.

If a yellowish diamond fluoresces blue, the effect could be strong enough to mask the yellow tint when viewed under a jewellery shop’s fluorescent bulbs. You might be surprised by the diamond’s true yellowish colour when you look at it at home under different lighting.

A strong fluorescence brings diamond prices down, sometimes quite a bit, since yellowish tinted diamonds are less desirable than whiter stones.

The presence of fluorescence is checked in each and every diamond that Arlington & Co. use.


Most fluorescence is subtle. You will not see it as a true colour change, just a slight shift in tone. However, the difference could make a diamond ring with multiple stones seem out of balance if some of the stones fluoresce and others do not, or if they fluoresce different colours.

Arlington & Co. only accept nil to very faint fluorescence in respect of any diamond.



Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s