But let’s be a bit more specific. What gives gemstones colors, or rather, what changes the way they absorb and reflect light so that they come out in so many different, striking colors?

The red color is caused by traces of chromium. Corundum also forms sapphire in many colors, which generally come from trace mixtures of iron, titanium, and chromium. Emeralds are formed of a ...

5.3 x 5.3 cm. (2.1 x 2.1 in.) ...

I therefore decided to combine these two elements and integrate with baguettes and differing shades of coloured sapphires to form the collection.’ The jewellery, which includes seductive rings and ...