The mighty Corundum and its Sapphire and Ruby offspring

WHAT-COLOR-IS-SAPPHIRE

Colour spectrum: corundum

Colour spectrum: corundum

Corundum

A word which I’m sure many people glance over and read as conundrum…unless explained you could end up none the wiser!!

Corundum is a species of gemstone which includes both sapphires and rubies as they are essentially the same chemical construction… AL2O3 for nerds like me!  It is a 9 on Mohs scale and therefore the second hardest material after diamonds ….very useful for making great rings that can be worn everyday. Also useful to know is that when red the stones are known as Rubies, with the remainder being called Sapphires. A very high proportion of coloured stones being sold in jewellery shops all over the UK have been heated to improve the colour…..jewellers should declare if this has happened but sadly many retailers are not gemmologists and do not know how to tell the difference…high quality untreated stone are more valuable and I often sell these stones with a certificate to state this.

Rubies

If you are lucky enough to be born in July then rubies are your birthstone and are considered the king of gems and represent love, health and wisdom. It was believed wearing a fine red ruby bestowed good fortune on its owner. Ruby and Diamond cocktail ring

Ruby and Diamond cocktail ring which was a birthday gift made all the more special as their daughter is called Ruby… the pendant was created from a lonely earring when its’ pair was lost.

Ruby and Diamond Pendant

Ruby and Diamond Pendant

Rubies vary from pinkish to purplish or brownish or bluish red, depending on the chromium or iron content of the stone. What is interesting is that aluminium oxide, with very small amounts of chromium, creates pure pink sapphires…as the chromium level increases you move towards rubies….it is strength and depth of colour, as well as the clarity, that determines the price of the stone, however, with just the right level of chromium and a tiny bit of iron the really beautiful and very rare padparadscha pink/orange stone is formed. Ruby drop pair

Unheated Ruby drop pair…currently available for sale…would make stunning earrings!

Sapphires

Many of my clients are so surprised that sapphires come in such a variety of colours…other colouring agents are iron and titanium for blue, vanadium for violet and orange and a small iron content results in yellow and green tones….

I enjoy stones almost every day of my life and some really special ones haunt me forever….There are so many colours to choose from, which makes it difficult to pick out my favourite, however, this amazing 14ct lilac sapphire was one that I did manage to keep…On my website you can also see a lovely ring made of two tone green sapphires set in rose gold which I made for an engagement ring …untreated_lilac_sapphire_and_trapezoid_diamond_ring

Untreated Lilac Sapphire and Trapezoid Diamond ring

Sadly the retail high street has such a limited colour range of sapphires on show…..I find my clients adore the individual beauty and enormous colour range on offer when making a bespoke piece of jewellery with me, exactly the perfect colour for you. After almost 10 years of making bespoke jewellery I am almost convinced that the stone chooses the wearer.

Sarah x

images via sassalina.com and gemhub.com

Advertisements

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 )

Google photo

You are commenting using your Google 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 )

Connecting to %s