Sapphire & Diamond Ava XVII Ring

With a distinct Scandinavian aesthetic and enduring fascination for geometry, Kamilla Ruberg draws inspiration from her creative home, architecture and sculpture. It is asymmetry however, which remains the signature trademark of Ruberg fine jewellery.

Most commonly found in shades of blue, sapphires are also available in pretty much every other colour you can think of, with pink, yellow, peach and green being the most popular after blue. Sapphires are also very hard, with their rating on the Moh’s Scale falling just under diamonds, so they make great gemstones for daily wear on the hand.

The quality and therefore price of sapphires is based on their colour, cut and clarity, and large stones can be GIA certified as diamonds are.

The colour of the sapphire is by far the most important of all these. The shade, the tone and the depth of colour, as well as the uniformity of the colour - how well the shade is spread over the stone evenly - make a huge difference to price. Deep, dark coloured tend to hide the sparkle of the stone, so become less desirable, and sapphires that show a pure, even colour and brightness will be more expensive.

You may see sapphires where there are two different shades of colour in the stone. This is called a bi-colour sapphire, and is very common. Pure coloured sapphires with a rich, even tone in a single hue are the most conventionally desirable varieties, and therefore the most expensive. Common ‘cheaper’ sapphire rings found online will often feature lesser quality gemstones and the images may have been digitally altered, so make sure you always see a coloured gemstone in real life before buying.

Depending on the size requirements sapphires make a beautiful alternative to coloured diamonds. Yellow sapphires, white diamonds and yellow gold are currently a popular choice, but our favourite sapphire shade is a murky olive green.

Sapphires are traditionally the birthstone of September. See all Sapphire rings here.

Like the round diamond's sexier sister, the oval cut diamond is longer and slimmer than a classic round shape. But be cautious: the oval diamond can take various shapes and forms depending on the height to width ratio, and whereas it's a personal choice, the proportions are important to make sure the sparkle is maximised. For this reason you'll find that prices vary a lot even if the carat weight is the same, as more 'desirable' ratios will be more expensive.

The oval diamond is our choice for a solitaire engagement ring; more unexpected than a round diamond, and the longer height elongates the fingers.

See all oval cut diamond rings here.

The sapphire in the image is 2.19ct and the diamond is 0.23ct.

Ring Size M 1/2

Matching band, other sizes and cuts are available to order, please make an enquiry to find out more.

Platinum is a bright, white precious metal that is commonly used in wedding bands and engagement rings as an alternative to white gold. It is more durable than gold due to a higher density and chemical composition, so it is less likely to break and suffer wear and tear. It is excellent and staying bright and shiny and resists tarnishing very well.