The April birthstone is diamond, with our Gemstone Sale currently live, we spoke to Oliver Horner, Jewellery Assistant from Fellows' London office, who gave his thoughts on what's so special about diamonds:

Diamonds are amongst the most sought after and important gemstones, with many factors contributing to their demand. Their unique physical properties include a high adamantine lustre possessed by few other gemstones. The anatomical structure makes it the hardest known substance, making it ideal not only for jewellery, but for industrial machinery.

London jewellery Oliver Horner, Jewellery Assistant from Fellows’ London office.

Due to its rare structure, the cutting of a diamond has been perfected to create a set of ideal proportions. These proportions coupled with the high refractive index results in the vibrant ‘fire’ which diamonds are known for.

The quality of a diamond is based on the four C’s:

  • Colour – ranging from colourless to yellow/brown.

  • Clarity – how free from inclusions the stone is.

  • Cut – the shape the stone has been fashioned into.

  • Carat weight – how much the stone weighs.

The above is carefully considered when grading a diamond, as these factors heavily influence the price of the stone.

Gemstone Lot 9 - A square-shape fancy brown-pink diamond.

There is a great selection of diamonds in our upcoming Gemstone sale on the 26th April 2019 - which is live on our website now. Lot 9, A square-shape fancy brown-pink diamond, weighing 0.66ct is definitely one to watch as the rare pink colour and VS1 clarity make it a really lovely stone. I'm sure the sale will attract a lot of interest as it's full of beautiful gems.